Seeing as many of the third-party launch games on Wii U are already out on the PS3 and/or 360, those games are going to have to do one of two things. Or maybe even both of them.
Those games are going to need to make real good use of the Wii U controller, and they're going to need to look better than the 360 and PS3 versions of games.
The jury is still out on the gamepad, but Batman: Arkham City at least looks... a bit better... in some places? Honestly, even in HD and at fullscreen, you're hard pressed finding many differences outside of some shinier character models.
Batman: Arkham City Armored Edition [GameTrailers]