The Wii has potential with the WiiMote and the sensor, but Nintendo aren't really making games that use the sensor. Only dumb games like that Carnival game...I can't decide which has better games, the PS3 or 360, so I'll say it's a tie xP.
You know these debates over the best consoles are flawed in that it is not about the console but about the actual games, and so it comes down to which console ha better games, and in my opinion the xbox 360 has either really good exclusive games or ok exclusive games, whereas the PS3 all its games are quite good but not as good as the xbox's amazing ones