I think the versatility of the control is offering many ways to control games, including the traditional controls of a Classic Controller or a PS360 controller.
I really wish that developers always give an option of using new fancy controls that use the special abilities of the controller
and traditional controls. Like with the 3DS I think everygame that uses aiming should have an option for TS-aiming (yes, I`m looking at you RE:Revelations!)
Let`s take CoD as an example: There should always be dual-analog-controls and the Wiimote-Nunchuck-combo as defaults. But for example they could include an option for using the gyro to aim while ADS or sniping.
Or in BatmanAC there could be many ways how you could incooperate the gyro for gadgets. I think how that broadens the boarders of the TV and just could show the image on the TV in a different way could lend to some pretty interesting gameplay-mechanics.
Or if ME would come to WiiU the normal gameplay would be on the TV and on the TS of the controller you would have a bird-perspetiv and you could command your allies by touching and such.
Or having games only play on the TS similar to NinjaGaiden

S.
And so on... the possibilities are limitless while still allowing developers to be lazy and just port games over with not much effort!
Thankfully as I heard the controller is said to be very light and comfortable, despite the fact that it`s huge! So this wouldn`t get too tiring...