It looks like it is a wireless networking box, some software that allows you to access digital media, and an amplifier...
I imagine that you could pipe CD level audio through it, as long as that audio already exists on a PC. The reality though is that it seems as much like a wireless MP3 control unit than a piece of gear that is truly versatile.
That's not to say it's not excellent for a lot of people that are looking to retro in some equipment into their home. But, the unit still must be plugged into the wall for amplication, you still need some speakers plugged in for audio as well, and if you have a nice CD player & collection then it doesn't appear that it can be played, or controlled directly from that unit.
So, if you have an 8 room setup that you want individual control of:
It will cost you abut $6,000.00 for the Sonos equipment, plus the price of 16 speakers (8 pairs)... let's say $150.00 a pair so $7,200.00 and you still can't play DSS music (or cable music), your FM tuner, your CD collection.......
Retroing may be less money, and is definitely less money if you have some wiring skills and aren't afraid to put a few holes in your drywall. Then you can hook it up to a multi zone music server from any number of companies.
It does look cool though, just needs some refinement and some analog to digital capabilities.