I'm not exactly a Wii fan but it will be dominate until they stop putting out Mario games every 4-7 months. As long as they keep Mario going their domination could continue.
As for 360 I don't think it is as bleak as Patcher states. They have huge room on price, and they will start announcing the 2008 lineup around GDC probably. But, I think Microsoft are trying to keep their cards close to them this year so that they can counter each Sony move.
Sony, will improve. One thing for certain is the brand name and no matter whether it lacks content or not that will keep them in the game. MGS4, KZ2, LBP, etc. will only help.







