In a three-hour live-stream of Shadow of The Eternals, Denis Dyack announced that the Wii U version will look as good as the PC version when asked about the differences in each platform for the game. He also stated that when they looked at the Wii U, they loved it's specs.
Here is the quote of what Denis Dyack said when asked about the Wii U version :
“Yeah we think so, the bottom line is everything we are doing here is pretty much compatible, and we are not doing anything special that is forecluded on the Wii U here in this technical demo. We looked at the Wii U, we love the specs.”
‘Most people will not be able to tell the difference between the Wii U and PC version.’