I'm not saying I WOULD buy a Wii just for Gamecube games, I'm saying that IF I had a Wii, I'd only play Gamecube games ('cause I don't like any Wii games). That's why I'd rather have a PS3.
I forgot about Metroid Prime 3, but I may not like that because I hate Wii's controller. I'm not interested in Super Mario Galaxy.