Resident Evil 5 I think will benefit most from being co-op. I can see myself playing it for that reason alone, where I would otherwise have given the game a pass. But we'll have to see how it turns out. I may try to convince my wife to try the demo with me if that has split-screen support.
By the way, just came across this - really went under my radar until now:
http://www.play.com/Games/PlayStati...eplate-Console-Skinz-Characters/Product.html#
I've always thought it would be easy to do at least on the PS3, although I'm not even sure if this thing uses the same manner that I expected. Is this going to be a new trend?