I could see that. It'd be a lot better than some trace and color tech demo.
Since we just got a Zelda and a new Mario game probably still needs time in the cooker, I think Nintendo could do well to launch with 3 of their "B" franchises. Pikmin 3 would be a fan favorite, but I think an RPG like Fire Emblem or Advance Wars could also be a good use of the uPad. Fire Emblem might need to be suped up a little to make use of the features, but it could still work, especially with multiplayer. The third game could be a new Metroid game. The uPad would make a great scan visor, and I think they could squeeze in a few other features like using the touch screen to manage/mix/match weapons.