Don't get me wrong . Sonos makes great and rock solid products . However IMHO Sonos by alienating themselves from the rest of the crowd create competition ( URC streaming player etc. ) . Sonos could be the only and the best , instead they risk loosing that part of the market .
Even simple home theater - AV Receiver with two zone / multiple source and Sonos integration becomes this kludgy solution with two remotes ( or two apps ) - there goes " maintaining user experience " . Just a basic ability to control volume and transport buttons would be huge .
From what i understand there are still Nevo and Pronto - sonos solutions , but that does not help the rest the URC / RTI / Crestron / AMX etc. crowd .