"With the announcement of the PLAY:1 comes several new software improvements. For example, the Mute button on your SONOS speakers can now be used for Play/Pause or Skip so you can easily control the music without needing to reach for your phone or tablet. You can also control your systems at work and home without having to reset your app."
I'm not sure how the skip function works but for me the mute/pause function really isn't a 'software improvement'. I used to use the mute button to kill the sound in a grouped zone. IE :- lounge and kitchen are grouped and I don't want to ungroup but I want to kill the sound in the lounge. Now the mute button pauses it. Same difference right? Wrong. Now if you hit the mute button later (as the green led really annoys me) it starts blasting out the music for a few minutes at the exact point you hit mute/pause hours ago. I woke my wife up by doing this and she wasn't too pleased. The skip function could be handy for me but I'd rather have my old mute button back