Buying Wii or Wii U?

You're kidding right? Almost the entire ps3/xbox360 library is on PC, wiiu is the only system that doesnt have a legal method for getting games.

Nope. Just off the top of my head, games that I would want to play (On ps3) that are console only (And to be nice, I'm even going to skip over 1st/2nd party stuff from sony)

Tales of Vesperia/Graces/Xillia
Valkyria Chronicles 1
3D Dot game heroes
Bayonetta
Eternal Sonata.
Final fantasy : Corridor sim 13 1/2/3
Naruto/DBZ animu games because Im a sucker.
Okami HD
MArvel VS capcom 3

And I'm certain there are more, and on top of those, everything first/2nd party from sony.

Edit: Actually, let wikipedia do the hard work for me.

http://en.wikipedia.org/wiki/Category:Pl...only_games
http://en.wikipedia.org/wiki/Category:Xb...only_games

204 exclusive games on PS3 and 246 on Xbox360 I.e., not on PC

No idea when those lists were last updated, but clearly a significant amount of games are, in fact, not on pc.