Here is my thought on the Wii U, the games are not going to look bad. Sure they won't be as good as PS4 and Nextobox, but it won't be like the Wii.
With the Wii, pretty much most games looked pretty bad. Not just in comparison to it's HD brethren, just plain bad, and dated.
Even when PS4 and Nextbox look significantly better, Wii U won't look bad. Which is much different from last gen.
While I do wish that Nintendo would up the power a bit more, and return to a gamecube like strategy, they never will, so I will just buy it for exclusives, and use my PS4 for 3rd party stuff.