I love the design, but I can't see it being worth even $100 for a number of reasons.
1. It's got no inputs, so if you plan on watching Movies from somewhere other than Google Play, you'd need to get an entirely separate sound system since you can't run the TV audio (or any audio) through the Q. This means you'd need a home theater system for non-Google videos, which makes the embedded amp pretty much useless asides from setups where people only use Google content, or that are only for listening to music.
2. You can only stream movies to one Q at a time, so no one can watch different movies in different rooms. (Unless they're using different Play accounts, perhaps?)--at least that's what it says on the website.
3. Can't even operate it without an Android device. So if my mom came to visit she couldn't listen to music while my wife and I are at work since she has an iPhone.
4. How much would multi-room cost? $300 per unit? I'm really not feeling that considering the limitations.
If I could pass audio through it I'd think it might be worth considering as a replacement for a receiver (provided your TV has enough inputs that for all your devices), but without at least that, no way.
Allowing it to play bluetooth audio streamed through other apps on the Android device would go a long way as well, since it would at least expand the available content.