After the newest video I think 3D World will be a hit, probably a bigger hit than the 3DS version or Mario Galaxy.
Other will buy the system for Pikmin 3, Wonderful 101 or even Wii Party U and Wii Fit U. Wind Waker HD will surely sell to the hardcore fans.
On top of that there will be some multipat-games like Deus EX, Watch Dogs, Assassins Creed IV, Rayman Legends, Batman Arkham Origins and so on.
So I think the Wii U will sell this holiday, probably better than Xbox One and PS4 but 2014 will be more interesting.