First, to temper your excitement, this is not Project xCloud. That service lets you play games on Android phones from the cloud, while this remote play function instead casts games from your Xbox One to your phone. Basically, you'll still need to be in your house to use remote play.
To use remote play, you'll need a solid internet connection and a Bluetooth controller for your iPhone/iPad. Microsoft isn't first to let you stream its games onto iOS, with Sony's Remote Play.
Still, it's a notable step toward Microsoft's cloud-based future for the Xbox platform. While Sony is focusing on piling up exclusives for the PlayStation, like the upcoming Ratchet and Clank: Rift Apart and games, Microsoft is focusing on Game Pass and Project xCloud. The former is a Netflix-esque service that lets you , while the latter .
Remote play for iOS is also of note because Apple, notoriously protective of its platform, has in the past . Microsoft is reportedly hoping to bring xCloud to iOS and iPadOS through a web-based app, rather than through the tightly controlled App Store, but Apple shows how kindly it takes companies trying to circumvent its rules.
The new iOS Xbox app, as with its Android counterpart, lets you manage your console from your phone. You can delete games to free up memory and, more importantly, download games to the console so they're ready to play when you get home. You can also share videos and screenshots from the app to your social media, if you're into that sort of thing.