It's not the most perfect game visually. I'm interested to see how the weather effects come together (if they'll use heavy DOF, which I loved, from TW2 for rain). If there's thunder storm and how they'll handle the lighting. I've criticised the foliage transparency maps and pop in. But I think I think it comes down to this for me:
I just can't think of other open world games that look this good. I guarantee Wild Hunt will be usurped because it is, in many ways, the very first open world game specifically for current gen hardware. Every open world game in existence takes a hit visually and in production consistency (eg: quality of lip syncing) compared to smaller, linear games. The only exception to the rule is Rockstar's game, but arguably nobody else in the industry has decades of experience with the genre like them, along with the manpower and money.
For a game with two massive open world maps (totally much larger than Skyrim apparently), variety of locations, heaps of narrative/dialogue driven quests, and all the stuff you can do in the game, Wild Hunt looks very, very good. Technically and artistically.