I'm not interested in buying the Wii-U for similar reasons. When the original Wii came out, I was intrigued at the idea of "motion gaming" and being able to test drive the Wii remote. Bowling ended up being really fun on the Wii. Even though the system didn't showcase fancy graphics, the controller was able to capture everyone's imagination.
Now look at the Wii-U. It basically has PS3/360 graphics, which will make it the underdog when Sony and Microsoft release their consoles. Nintendo is still very amateurish at providing a quality online experience, and they have very questionable policies with digital purchases. Their tablet/controller hybrid doesn't come across as anything that makes me want to scream "WOW! I GOT TO TRY THAT!"
The Wii ended up being a huge dust collector for me because the waggle novelty wore off quickly, the online features stunk, and the library couldn't compete with what PS3/360 had. Many 3rd party publishers avoided putting their AAA titles on the Wii, and now they have the same attitude towards the Wii-U.
Wii-U still has a chance to succeed, but I think they will need to offer a "must have" piece of hardware for it that isn't a tablet controller. Imagine if Nintendo formed a deal with Oculus Rift for example. I would run out and buy a Wii-U today if they announced something major like that.
System launches are supposed to be exciting. There should be something on offer that is so good it is hard to describe. That's what originally made me want to try out the Wii Remote, because people kept describing how good it "felt" to bowl with the controller. I can easily imagine gaming on a tablet controller, just as I can imagine gaming on graphics hardware that looks identical to consoles I already own. The only appealing thing Nintendo has to offer is their first party games, but when they tend to focus only on "cute" games and avoid making "cool" games like F-Zero and Metroid, it leaves me with no reason at all to even look at the Wii-U.