The beta app has arrived for Android, Windows 8 and Windows Phone, letting anyone try the recently-announced SmartGlass features.
The update for Microsoft's console also adds SmartGlass improvements, as well as access to Netflix and Hulu without an Xbox Live Gold membership.
Microsoft is set to release new Xbox One TV features to select Xbox Live members. SmartGlass also gets some updates that will roll out to everyone.
The Xbox One feels like an entirely new living-room device, but there are still some hurdles on the way to its ambitions.
The cheaper price represents a major shift for Microsoft, as does a decision to drop the $60 annual fee to access streaming content such as Netflix and YouTube.
Mobile purchases, more social connectivity, and yes, 3D Blu-ray playback: Xbox One gets a handful of new perks in a software update coming soon.
This USB tuner means Xbox One owners can watch TV via their console without switching TV input, and use voice controls too.
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The Xbox One Media Remote is a must-have accessory that makes it much easier to accept a gaming console as the hub of your living room.
Facebook dominates the mobile messaging world with its $19 billion acquisition of WhatsApp. CNET's Bridget Carey explains the value of the app, along with news about the Xbox One and a high-tech toothbrush.
Due early next month, the remote control will help Xbox One owners control their Blu-ray discs, streaming video, and more.