A few more thoughts on Ouya having a fair amount of Sunday playing on it:
1) Games are very limited at present. Have played a lot of Vector and Cannabalt HD, but they're available on Android, too. Still a few I want to give a go, including Chrono Blade (an exclusive), but lots of work needed here.
2) Basic interface is great. It is basic, but it's fast and responsive and easy to navigate.
3) Controller is nice enough, but D-pad is poor and one of the triggers on mine is a tad sticky.
4) There are a tiny selection of non-game apps, but a couple of quite interesting. Flixster includes Ultraviolet support, which is a way into movie access, and there's another that lets you stream games from your PC to your TV using Ouya.