Graphically the Wii U can hold it's own. No doubt about that.
It's the library diversity and selection of games I'm worried about.
Keep in mind as well that the Wii-U is the only next-gen console that is backwards compatible. I've played several of my old Wii titles on my Wii-U without any issues whatsoever.
When an anti-piracy method is affecting the game for people who legitimately bought it and causing other people not to buy the game, there is obviously something wrong with it!