I don't see ANY major differences between Madworld and other games on the 360 or PS3. Besides some motion controls, there really isn't any other things that separate them both.
I like my Wii and have a couple of games I adore, but there just isn't enough out there. I just don't get why people stay loyal to a console, when they could expand onto others and have both worlds. Sorry man, if you're a core gamer who loves the occasional "Madworld" type of a game, and still love innovative and new gameplay that the Wii offers, get a 360 or PS3 to be its buddy.