Exclusively Smash 4, Hyrule Warriors, Wind Waker and Twilight Princess should hardly be called that? They're available on 3DS,3DS, GC and GC/Wii respectively.
Based on the actual exclusives I would give it to 2013 just for Pikmin 3 alone, that game will have me buy a Wii-U before this gen is over.
Smash and warriors are console exclusives. Wind Waker and TP are remasters of old games exclusive to the wii u for this generation.