Looking back at the Wii release list you do get basically every "big" franchise, Zelda, Mario, Metroid, Paper Mario, Mario Party, Mario Kart, Smash Bros in the first couple years along with the Wii Fit, Wii Play, etc. that ate up the charts. Then 2009 has Wii Sports Resort and NSMB.
GameCube actually looks pretty barren in retrospect. (Though I like a good number of those titles.)
All I know about Wii U (which admittingly isn't much) is that there's a Mario Kart and Smash Bros coming at some point along with a Wii Fit and Wii Party. And of course there will be a Zelda, Mario, etc. eventually.
EDIT: Looking at the full Wii list I can see why I was able to stick with Wii/PC for so long, there was a pretty decent clip of stuff coming out those first few years. (Factor in how most everything else I wanted was getting or was a PC release.)