Soundwave on 12 December 2013
Nintendo Land, Zombi U, Game & Wario, Batman: Arkham City, Wii Party U, and Rayman Legends pretty much do most everything with the game pad aside from the Wii U Zapper thing that Nintendo showed.
I guess Wii Sports Club soon with golf (put the tablet on the floor) and baseball (catching) soon as well.
The gamepad is demoed fairly well by quite a few games actually.
