Honestly, we aren't going to see any "next gen" multi-platform software titles until either the PS4 or 720 are released. The Wii U will, in effect, be current gen unless Nintendo or exclusive developers push the envelope well beyond what the PS3/360 can accomplish. Until then, it will have to depend on the novelty and/or innovation that its controller provides to separate itself in the market. Performance should be better across the board, if developers optimize, but most people aren't going to really care about that, or about modest gains in visual quality. Few people are going to replace their PS3/360 just for that.
The Wii U is going to spend half its effective life as this gen and half as next gen. The software, as always, is the important part.
