The Wii only had like 6 or 7 truly great games outside of all the casualware.
Mario Galaxy 1 & 2
Metroid Prime 3
Skyward Sword & Twilight Princess (which is really a GameCube game but whatever)
Xenoblade
DKCR
And uh ... yeah. Mario Kart Wii was alright but a step down from Mario Kart DS, Brawl was kind of a let down. Things like Super Paper Mario and Metroid: Other M were just flat out duds.
Not to mention the ridiculous limitations of the Wii-era ... ugly forced muddy SD resolution (looked awful on modern TVs) and Nintendo refusing to let people use more than 512MB (incredibly stupid) for ages.
The Wii U by year end will be at
Splatoon
Bayonetta 2
Mario 3D World
Mario Kart 8
Smash U
Donkey Kong Tropical Freeze
With Captain Toad, Wonderful 101, Pikmin 3 and by the end of the year you can add Super Mario Maker, Star Fox Zero, and Xenoblade X to the Wii U list.
1st/2nd party wise the Wii U is more than holding its own. Even though the Wii had more third party support, Monster Hunter 3 and GoldenEye were like the only two new games for the system from third parties I'd say were great most third party content on the Wii was just garbage.
