Apple introduced a variety of new elements in iOS 11, and to help with developer adoption of things like Core ML, more Siri domains, new and expanded camera APIs, among other things, this requirement will be rolled out in a couple of months. (iphonehacks.com)
Android Wear has many more options thanks to higher developer adoption. (greenbot.com)
Additionally, Kuo notes that a TrueDepth camera on both the iPad Pro and iPhone X will increase developer adoption. (techspot.com)