I doubt it. When you start to see games being built from the ground up for the Wii U. It's like putting a Toyota engine in a Hyundai changing things around to try and fit it and the wonder why it doesn't perform the same way a Toyota does or better. Give it time. Just like the PS3 often doesn't perform to the same level of the one year older XBOX 360. Don't always expect such a fast start out of the gate for the next Big 2.
When developers have a better grasp of the Wii-U's hardware, and if good budgets are applied, I see an exclusive Wii-U game turning out better than the best PS360 games. However I don't see the system magically keeping up with the PS4 & 720 or ever having any games that look as good. I'm not sure what you expect out of the Wii-U, so maybe a better understanding of your expectations would put some things into context.
If you're expecting the same improvement curve as we've seen this gen, you're going to be disappointed. If you expect 2nd gen Wii-U games to look as good or better than PS4/720 games, you're going to be disappointed. If you think the jump will also be minimal for PS4/720 launch titles (like they are with the Wii-U launch), you're going to be disappointed.
All IMO of course.
When something is built upon something that it is made for you don't have to cut out this or edit that. Like if, you purchase a big tub and your bathroom is a little bathroom you either have to get a smaller tub or make the bathroom bigger to fit a big one. When games are made from the ground up it will be designed to take advantage of the Wii U's capabilities. You don't have to say this doesn't match I have to rework this and that to fit the Wii U. You just do it!
No, you don't "just do it". With a better understanding over a system, you take advantage of the strengths while doing what you could to work around the bottlenecks. Things don't just "click" for you and all of a sudden this vast wealth of possibilities opens up for you to just do.