Apple today released the first developer beta builds for its next round of OS updates, including iOS 10.2, macOS 10.12.2 Sierra, tvOS 10.1, and watchOS 3.1.1.
iOS 10.2 is presumably the update that Apple was talking about at its Mac launch event last week when it introduced the TV app, but the app isn't included in today's build. It does, however, contain a few new features.
You'll also find that there's a setting to preserve the mode that your camera was last in; for example, if you closed the Camera app while recording a video, you'll be in video mode the next time that you launch the camera.
The update comes just seven days after Apple released iOS 10.1 to the public, and a few hours after it released iOS 10.1.1. Devices that are enrolled in the developer beta never saw today's update, and now we know why.
As for macOS 10.12.1, watchOS 3.1.1, and tvOS 10.1, that's all a bit of a mystery. Apple Developer seems to be down at the moment, so we're unable to check the release notes.
One could assume that watchOS 3.1.1 doesn't have any front-facing new features, given the version number. tvOS 10.1 will likely have the TV app at some point, but today's build doesn't.