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The Mirage Solo, like the Oculus Go, is also a standalone VR headset, no phone or PC required. But it's a little different. Its tech pushes more for where the future of VR will eventually be. But at $399, it also costs twice the price. And the Mirage Solo isn't a full step to the future: it's a half one. I'll explain.
The Mirage Solo is now available, a year after it was announced at Google's 2017 developer conference. After wearing it for a few days, I can already tell you that, while it shows where VR is heading, there's no reason to buy the Mirage Solo at launch.
Editors' note: This review covers the Lenovo Mirage Solo in its original shipping state. We'll update this review in the future, when and if new software updates change the experience to the point that our overall recommendation changes.
The Mirage Solo looks like a VR headset you'd use on a desktop PC, or even the PlayStation VR: a padded display with lenses, attached to an adjustable visor you tighten around your head. Much like most Microsoft Mixed Reality VR headsets released last year, the Mirage Solo has a similar design. It even looks a bit like Lenovo's PC-connected wired VR headset.
Mirage Solo is totally standalone, but only the second device to ever be completely PC or phone-free -- Oculus Go is the first. Unlike the Oculus Go, however, there isn't even a phone app to pair with. Just plug it in, charge it up, turn it on and set it up, and you're set.
Google has its own phone-connected VR goggles, Daydream View, that work with a selection of Android phones and offer up basic VR much like the Samsung Gear VR. The Mirage Solo runs on similar software, but with a few key extras. The biggest is it allows some level of room tracking, enabling movement similar to what PC-connected VR and the PlayStation VR are capable of. It does this through two fish-eye cameras on the front of the headset (called inside-out tracking).
Inside the box, there's the headset, a little motion-enabled controller that's exactly like the one that comes with Google's Daydream View.
The Mirage Solo's biggest trick is tracking motion in space, something called 6 degrees of freedom (6DOF). Using motion sensors (gyro, accelerometer) plus two wide-angle cameras on the front of the headset, it can track your movement. Ducking, leaning, stepping: This is the stuff the Oculus Go, Samsung Gear VR and Daydream View cannot do.
This is the first mobile headset that's had this kind of tracking, and yes, it's basically the same tech that's in Microsoft's PC-based VR headsets. No room sensors are needed. I tried it at my desk, in the office cafeteria, at my train station, outdoors and even on a train (don't do that: vehicle motion makes the tracking drift).
Sometimes, it's amazing. Virtual Virtual Reality is a game (also on the Oculus Go) that feels incredibly immersive. The sense of "being there" is definitely enhanced with the headset's usually good extra camera-based tracking.
There's a drawback, though: the range of movement is super-limited to just a couple of feet in any direction. If I take more than about two steps, the VR world fades to black and a message tells me to step back into my VR zone. Google says the reason for this is safety and comfort. The Mirage Solo has no ability to recognize obstacles in the world around me. But it can recognize where the ground is, and can learn to ignore people walking nearby to keep tracking smooth.
The extra degrees of movement do make the VR feel more comfortable: when in Google's Arts and Culture art museum, I can lean into a piece of art. In BBC's tour of life on Earth, I can peek around the edges of a cartoon 3D otter. I can bend down to examine something. I can duck snowballs being thrown at me.
But if I try to really walk and explore, it's not so great. PlayStation VR, Oculus Rift, HTC Vive and Microsoft VR headsets cast a wider freedom of motion that's still not huge, but is a larger cage to live in.
The other drawback is the included controller. It's the same point-and-click, three-degree-of-freedom motion controller that comes with Google's step-down Daydream View, and while it's fine for basic interactions, has a clickable trackpad and volume controls, and can even be used to do things like cast fishing rods and "grab" objects, it lacks more advanced spatial tracking to match what the headset can do (6DOF, meaning actually accurately tracking the controllers in 3D space with the cameras).
The Oculus Go has a similar type of controller, but since I can't move around with Go, I found the simple point-and-click design fit better. With Mirage Solo, the simple controls ended up feeling limited, and even drifting a bit in tracking (pressing a button on the controller re-centers it, but it's annoying).
I'd love to see this headset get a wider range of motion, and also let me use two controllers with more accuracy and manipulation, like the Oculus Touch's controllers. But that future isn't here yet.
The visor-based way of wearing the Mirage Solo means it didn't press in on my face, and spending half an hour in the fantastic and weird game/app Virtual Virtual Reality was easy. A knob tightens the fit of the visor in the back, and a button underneath the headset makes it slide closer or farther from your face.
But the visor is fixed to the headset, making the whole thing cumbersome and hard to carry in a bag. Maybe you don't envision going on trips with your VR rig, but the Oculus Go is far more compact with its Velcro straps.
The Mirage Solo requires headphones for audio: Lenovo includes a short-corded pair that are fine. But there isn't any onboard speaker. The Oculus Go has a great set of onboard speakers that make sharing VR a lot easier at home, no headphones necessary.
The headset has some extras that are helpful: a microSD card slot allows expandable storage, unlike the Oculus Go. The headset and controller charge via USB-C (one AC adapter included), which I now prefer to Micro-USB.
Google's own selection of VR apps is really well done: YouTube is a massive repository of videos, Arts and Culture offers plenty of art exhibits to explore, Street View is a fun way to dive into checking out the world in VR and the new VR180 format of 180-degree 3D videos will work on the Mirage Solo. Lenovo is making a separate $300 Mirage Camera that shoots these 3D photos and videos. That's not a reason to pick Google as your VR ecosystem, but it shows progress.
VR looks like it's all the same, but it's changing: Soon enough, headsets will seamlessly track the whole world through their onboard cameras.
The Mirage Solo shows how well that can work, but I think this first step needs better controllers, a lower price and more apps. Google promises that 60 apps will support the added motion tracking in the Mirage Solo, and several games (Rez Infinite, Bait [a fishing game], BBC Earth Life in VR, Blade Runner Revelations) I've used already use it. But how many will make the leap? Google promises that existing apps could be ported easily to take advantage of the extra tracking, but the Mirage Solo literally stands alone as the only product it would be used for. Of all the many Google Daydream apps you can try on the Mirage Solo headset, there aren't that many that support its extra motion-tracking tricks.
Will this headset track over a larger range, which Google says it could do, in theory? Will new controllers arrive? Will it maybe be able to do mixed reality, blending what the cameras see and what appears in VR? Not right now, and by the time these possibilities arrive, I bet they'll be part of a newer, better headset.
Next year, I bet more headsets use in-headset camera-based tracking. The future belongs to where the Mirage Solo and Google are going. But Oculus, Google, Microsoft, HTC and many others are all going there. Right now isn't the best time to buy a headset to use it, unless you're really, really curious.