I can't believe people are saying that Sony should be out... are ya serial?
Well, I think that no one should leave and the industry wouldn't be better off without any of the particular brands. There are elements of EACH of the companies I don't like but not enough to say they are 'bad' for gaming...
Personally I would LOVE for it to return to the glory days of Sega VS Nintendo. 8 and 16 bit days were the bomb fizzle.