timmychunks

I'm on iOS 11.3 beta 2 as well and it appears AirPlay 2.0 is at least partially working in Control Center. If you open Control Center and tap the AirPlay icon in the Music card you get a new window with a card for Music on the iPhone, one for the HomePod and each Apple TV running tvOS 11.3 beta. You can tap on the HomePod card and this gives you control of the play/pause, skip to next track and go back and the volume. When you tap on the the title of the track it opens your Music app and allows you to browse your collection and select something to play on the HomePod. You can use Up Next. You can then go back to Control Center, switch back to your iPhone card and select something different to play there. Similar functionality exists for the Apple TVs; however it appears it's limited to just control music at the moment and not videos (as far as it takes you to the Music app - you can you play/pause, volume to control video already playing on the Apple TV).