Wii/gamecube is more family oriented. I would rather have my son play on the Wii because I know there are tons more games that are friendly for him to play.
My husband is a big time 360 gamer. Its more of a console for him. He plays all the gore games like Gear of War, Dead rising and the war type games. Now the only games my son plays on there is Lego Star Wars 2 and Halo.
I like the set up of Xbox 360's Menu much more than the Wii. But I love the sensor remote the the Wii has and that I can DL older nintendo games on the Wii.
It all depends on what kind of games you like. I play mostly arcade games on the 360 and Sonic.
I say both of them will/has surpassed PS3.