Aside from Nintendo Land, which I still think could be done in a Wii Fit fashion (game + special controller for say $99.99), I can't really look at any of the big Nintendo Wii U titles -- NSMBU, Pikmin 3, Mario 3D World, DKC: Tropical Freeze, Mario Kart 8, Super Smash Bros. U, Mario & Sonic Winter Olympics, or Bayonetta 2 and basically all these games play more or less exactly the same with a Pro Controller versus the tablet controller.
I just don't see the point of basing an entire console around a concept when the majority of the big 1st party titles play more or less than same with a standard or Wiimote controller.
By this time next year as the Wii U is approaching its second birthday, you may very be looking at a situation where there's still only 4-6 games that really cannot be played without the Wii U tablet controller ... Nintendo Land, Wii Party U, Game & Wario, Zombi U, and maybe Art Academy U will be out by then. That's just kinda embarrassing.