You need a 64 bit Windows with OS version 7 or above with the latest GPU drivers on Nvidia or AMD and you are good to go. You can play some of the popular Nintendo exclusive games like The Legend of Zelda, Breath of the Wild, etc smoothly on the Cemu. The emulator is capable of running most of the games smoothly.
The best thing about the emulator is you get updates every couple of weeks keeps the bugs in check. Cemu is capable of running games in 4K resolution through graphic packs. Cemu is a Wii U video game console emulator developed by Exzap and Petergov.