So I played quite a bit with CEMU yesterday.
Ran into the following issue.
-Pikmin 3 runs PERFECT, I was in awe, until the point where I had to look at the koppad (or something like that) to pinpoint Mr. Poopalot, The map was showing on the screen but nothing else, so I was stuck.
-Xenoblade X ran OK in 4K but I wasn't able to see much because I got stuck at the part where I had to enter my name.
-Mario Kart 8 runs multiplayer in 720p, even in 4K.
There's a turn around for my two first problems, I would just have to get my saves from the Wii U, but that's two finished game that I wanted to restart...so...yep. :/
Still, all that shit, especially Pikmin, in 4K was beautiful!