Well, not really. MGS3DS chugs a lot where the PS2 original doesn't. GameCube/Wii and Xbox 1 were slightly more capable than PS2. In the end they were pretty near, though. There was never anything on GameCube/Wii that couldn't be done with a few downgrades on PS2 (even Mario Galaxy, which seems to fool everyone with skyboxes).
About the only thing I ever saw on Xbox 1 which could never have been achieved on the others (without seriously detracting from something central to the game) was Doom 3. It used the (then) advanced shader support of the original Xbox, without which the game would have lost a lot of it's atmosphere, a central theme.
I can't really think of any other 6th gen (and Wii) game that "couldn't" have been done on PS2. Many would have had to have lower texture resolutions, lower polygon counts etc. When it comes down to the crux of the matter though (when a person plays it), it would be mostly the same. To the point where most players wouldn't care.
It's like those Digital Foundry features (which I love). Most people just don't give a fuck about a few less frames per second, etc. For example, though PS3 BioShock is definitively worse than the 360 version, most people wouldn't even notice. It's that kind of minute technical difference which would be exhibited in a PS2 version of any Wii or 6th gen game you'd care to mention. Most people just wouldn't care.
I know when I look at Wii games, they graphically remind me of my PS2.
We know GTA V is in the making and at this stage are unknown to what platforms it will be on.
360, PS3, PC and maybe Wii U. You can bet everything you own on that.
( Edited 09.03.2012 01:29 by Martin_ )