i'm pretty sure that wii u version will look better than ps3 and 360 version and i see no reason why it shouldn't get the pc graphics (but not with same ssaa possibilities) and maybe even in 1080p but yeah, as long as there aren't those pictures we shouldn't compare wii u pictures which aren't wii u pictures with ps 3 pictures and you shouldn't say wii u version looks better than pc version and that the pc version is only the ps 3 version with better aliasing and lighting when the picture you posted to show new graphics compared to ps3 version is the pc version 
i would say wii you will get the pc version with different controls and additional content but not better graphics than pc version.
i surely hope wii u version will get even better graphics but i don't believe they will change the graphics one more time to get even more details in the areas.
