I have no doubt the Wii U is capable of more than what can be pulled from the PS3/360. The question is, will multi-platform games take advantage of that and fully optimize those releases for the Wii U? And no, I'm not talking about the naive "lazy dev" comments, but about real-world budget and deadline constraints. Will Wii U optimization require more overhead than publishers are willing to allow? I think that's going to be the big question.
I'm not sure how it's going to shake down, exactly. It probably depends on how third-party sales go. If core games don't move many units on the Wii U then it's possible that publishers will worry less about giving it the best possible version. On the other hand, if the Wii U builds a large enough installed base with a high attach rate then I could see it being the lead platform when the 360/PS4 are released, which would keep it from being phased out. Impossible to know, really, though I would suggest Nintendo fans not "boycott" third-party titles early in the Wii U's life-cycle simply because they aren't the best version. Publishers will be watching sell-through closely.
