ZombiU certainly has my interest, though I look forward to seeing how it's going to differ from, say, House of the Dead or similar.
New Super Mario Bros. U looks pretty much the same as the Wii version just on a larger scale with more Yoshi.
I'm still hyped for the Wii U, especially now we've the bastard offspring of an X-box and Onlive controller to play the 'hardcore' games with