It'll be interesting to see what happens when the OUYA becomes available. A lot of major developers have already committed to support it. I can't wait to get my Kickstarter unit in a few months.
I met with them last year when they were talking about possibly acquiring Bionic Panda Games (which unfortunately didn't happen) and they seem to have an interesting business model. Every game will have a free version, either a full but limited version or a playable demo, and they'll have their own store similar to Google Play.
The only deficiency is that they don't have a motion controller like the Kinect or Wiimote.