One thing I took away from checking out the Wii U is that the games are very pretty. The New Super Mario Brothers Wii U & Scribblenauts HD look stunning.
One game stood out to me as a pretty fun example of the new Wii U tablet style controller was Nintendo Land. Nintendo Land is essentially a set of Wii style party games similar in tone to Wii Play & Wii Sports....

It really does look unique, interesting, and fun. But so did the Wii, and with the exception of first-party titles, I barely ever touched it. There were a few good ones, like MadWorld and No More Heroes, but it's been collecting dust since Super Mario Galaxy 2. Nintendo made something amazing, but the lagging graphics and tons of shovelware kinda pushed out third-party developers.
Hopefully the Wii U is different, but I worry that once the new round of consoles that MS and Sony release will push it to the same spot as the Wii.
The last game I played seriously on the Wii was Super Mario Galaxy. My wife and I still pull out the Wii for the Just Dance games at parties. We just picked up Just Dance 4. I have a soft spot for the Wii, but like you it mostly goes unplayed. In the end, my Playstation 3 did more so hopefully the Wii U can fill that void.
I am wondering what Microsoft and Sony are doing next, so far I have no idea what that is but I will hold off until I know more for sure.
I'll admit that up until a couple weeks ago, everything I heard about the Wii U had been kind of underwhelming. But now that the system is out and people are getting some hands on experience with it, I'm seeing a lot of really positive reviews. Hopefully this enthusiasm will stick better with the Wii U than it did with the Wii.
I think the Wii U made some choices to give it lets over the next generation better than the Wii. A few reasons:
That said, for me the most exciting platforms are the PC, Steam in your Living Room and Apple TV with apps.