Of all the WiiU games we've seen thus far (and of the six I know I'll be buying for sure), Project P-100 stands head and shoulders above the rest for me personally.  Although it could largely work with just a standard controller, it looks the most unique, charming, visually pleasing, and for me, the most fun of any of the launch window games that have been shown.  Check out the following video in 720 res (the detail and colors look outstanding on my 42 inch plasma TV).

Video link:  http://www.youtube.com/watch?v=vD6QlYFyGO0

So what is your most anticipated game shown so far for WiiU?

Tie between Pikmin 3 and ZombiU.
I can't really choose :S

Easily Pikmin 3.

ZombieU or Tank! Tank! Tank!, that game looks really fun, although I wouldn't buy it at a full retail price

Pikmin 3, then ZombiU and then Mario.

pikmin 3 and then mario bros and rayman sharing the second place together

Hrm... this holiday season is going to be pretty awesome...

1. New Super Mario Bros. U
2. ZombiU
3. Rayman Legends
4. Pikmin 3
5. Batman: Arkham City - Armored Edition
6. Nintendo Land
7. Scribblenauts Unlimited
8. Assassin's Creed III
9. Trine 2: Director's Cut
10. NBA 2K13

Pikmin. But I really want me some Zelda.

1. ZombieU
2. Nintendo Land
3. New Super Mario Bros. U

None of them are definitive purchases though (unless Nintendo Land is bundled, Duh).

Pikmin 3 and ZombiU as a very close second :D