I wanted to make this point about the Ouya last week. I guess one thing people should consider when assessing it, is that its not all the different from set top streaming devices like the Apple TV, or the Roku box. Those kinds of devices have a market share simply by nature of how cheap they are, and their compatibility with streaming services.
So I basically think the best chance something like the Ouya has at succeeding is by being a convergence device as much as an independent game console. If the developers can make it compatible with numerous streaming Android apps out of the box that will be an incentive unto itself.
On the controller criticism, I think that its important to note how most devices these days communicate with bluetooth anyway. It would make a lot of sense to have an option built in to use your smart phone as a controller, and simply be able to mirror touch screen games like Angry Birds. Then the actual game pad can be reserved for games that attempt to do something more.
So to me, the Ouya is something that individually probably won't take over the game industry---although it may become a niche device, like a Roku box. But it gets at something I've been pondering for a while, which is that Sony would really benefit from more closely the Playstation brand with Android and Google---in a bigger way than just having Playstation Suit.
In the future it seems clear that media platforms will be software UI---not blu ray discs, or even digital distribution itself. Sony is never going to make a software platform comparable to Apple, Google, or Microsoft. So they shouldn't expend resources on trying to competing with them. I don't think there's any rule that says hardware that uses Android can't itself have proprietary features---games that don't run on other Android devices and so forth.