I heard a whisper that Mario Kart 8 has a Track Editor. That might be done using the Gamepad Touch-screen. The normal gameplay for Mario Kart 8 does not use the Gamepad. Iwata in his conference call had mentioned Mario Kart 8 will use Gamepad for something that justifies the Gamepad's existence.
I don't think Smash Bros will use Gamepad. Sakurai is already on record saying he is not interested in that.







