Sonos yesterday shared a on it's blog a post detailing their integration with the upcoming Airplay 2 standard from Apple.
If you have a Sonos speaker, amplifier (Sonos Connect:Amp) or pre-amp (Sonos Connect) you will be able to listen to music just by clicking on their phone or asking Siri to put it on. But only if you have the newer Sonos speakers like Play:5, Playbase and Sonos One, and (future Sonos products). When you group one of these Airplay-enabled speakers with older Sonos devices, you can bring AirPlay capabilities to your entire Sonos system.
Which all sounds great, except now the Sonos Platform is being broken into can-do and can't-do pieces, which is going to get confusing for many and frustrating for others.
So in reality, only the newer speakers work properly with Apples Airplay2, the rest of your Sonos hardware can basically listen in - by being grouped with that zone, which is basically a bit of a cumbersome bodge if you ask me. Of course they can listen to whats playing on another zone, thats the whole idea of the system - Except that now if you want to control the system through your Apple gear it's not going to work properly if you have older devices.
The Sonos Blog goes on to state;
Which in reality is a bit of a kick in the teeth to most owners who have a bit of (or any) technical knowledge. Their new speakers aren't bringing functionality to the older ecosystem, they are sharing their music to a group. Much the same as I can plug a CD Player into my Sonos ZP100 and share it to any other Sonos component by grouping them. It's not new functionality, sharing whats playing on one component to another, its the premise of the whole system - except now it's going to be borked if you try to use it with AirPlay2.