What he said. And actually this thread was seeing what I could do with my handheld control that I/Clients use to watch TV. The screen size is small and I was seeing how feesible it is to have at least basic control of a music server on the remote. 

Flipping apps back and forth is irritating as hell. It's one thing if its Sonos and you are ONLY using the sonos app once you switch to House Audio, but even that has some shortfalls of convenience that an integrated system offers.