I think 2011 will be weak for all consoles. XBox 360 should be comparably strong in the first half, coming off the momentum from the slim, and Wii also coming off the sleuth of games in the holdays, however neither will have much to keep them going throughout the year (I expect Kinect to be a dud and though Zelda should be big, I don't think it will be enough for Wii).
PS3 in comparison, has the regular mid-level hits that Wii lacks, but it has nothing truly big or gamechanging. It will remain in decline.
A game I'm developing with some friends:
It is largely a technical exercise but feedback is appreciated.