there is actually some skill involved in playing many wii games. it isnt just timing your botton presses etc. you have to point just right and move just right. that is what makes it more interesting to me. 360 and ps3 games just seem to be more of the same stuff we have had since the genesis or so, button mashing mindlessness with better graphics.
the inovation isnt just about making games fun to play again (as opposed to quake/halo/etc. clones) it really is a new way to play games. i just got sonic and the secret rings, and although it is just another 3d sonic game it is different and fun to play because of the controls.