After a long wait, my Chromebook (in beta) has access to the Google Play store. This is being rolled out across various Chromebook devices now. One of the major advantages of this will be control of Sonos via the Android app but on a Chromebook.
However I have been unable to get the app to find my system, which is fully setup and working via my Android app on my phone. I have the app on my Chromebook installed, and open but it doesn't find the existing system either on the initial search, or the subsequent one requiring button presses on the Sonos.