i think the Wii U might have difficulty on that as the Wii U might not be powerful to display something like that while having the GamePad screen on. they have just have the Wii U Pro for Unreal Engine 4 games while other games on Unreal Engine 3 can use the gamepad and be even more fun.
This could most likely be the case, however with Frostbite 2 and CryEngine 3 both are next gen ready and can be downscaled and optimsied to look both amazing on the Wii U while utilising the Gamepad.
Also Unlimited Detail Engine *may* change everything