Hrm... it's kinda tough to answer. If I felt that Apple were in the gaming business, I would say them easily. However, I see their games as a by-product of their multimedia products. So from my eyes, they're not in it already. And I'd like it to stay that way.
Of those who are in it, I'd have to say Sony. I feel that they are the ones most responsible for this mess that gaming is in today, and they've also brought the least to the table. They see an idea they like, they copy it. Sometimes it gets improved (N64 thumbstick -> PS1 Dualshock), sometimes not (Sega CD -> PS1 CD format). For actual gaming innovation, they've done the least. Nintendo did a gamut, from the d-pad to making motion a standard, and MS made online a feasible option and was the first to think of an actual HDD for console storage.
-dunno001
-On a quest for the truly perfect game; I don't think it exists...
