There's this game called Saturday Morning RPG on OUYA, you should totally buy it. I'm not biased or anything...
If you have friends to game with (and don't want to wait for the Steam/PS4 version), you should also pick up TowerFall. It's pretty great.
What, did you help work on that game? What's it like?
And is TowerFall fun as a solo game too? I probably won't invest in a second controller. And I don't have a PS4 or gaming PC either.