There is a fine line between Photorealistic and Stylized art styles. If we're talking stylized, sure Zelda U will compete with PS4 and XBone but with the graphical capabilities, Wii U will never compete and win to and Xbone or PS4 in terms of photorealism because of specs alone. There are graphical techniques that can be done on a PS4 that can't be done on a Wii U. It's specs. It all comes down to how you interpret graphical prowess.

By being on the NX

For one, it's probably received a graphical overhaul for the NX. Let's be real, this isn't going to be a Wii U game.

it wont. it will look worse than an average PS4 game.

I don't think it will look worst than the average PS4 games, just significantly worse than the best of them.

When was received a graphical overhaul for the NX!? Zelda U video we saw last Decembar was running on Wii U.

Of Course it will be Wii U game (but probably NX will get port), people that think otherwise dont have any reason for that and they are fooling itself.

you need also keep in mind ps3 games like the last of us does also look better then many average ps4 games. And wii u is even stronge as ps3.