Xbox and UWP (apps)
Xbox community can be about Xbox, Xbox insiders, Xbox anywhere, Windows core OS which is making it possible to play native Xbox games directly on Windows 10 PCs,( this started with State of Decay game) and cross platform features.
UWP apps can be about All of the conversations about Apps on Windows, Hololens, Xbox etc. such as built in apps, 3rd party apps and using App builder for developers.