Buying a Nintendo Switch just for Zelda: Breath of the Wild is so worth it, but now with the latest version of Cemu (v1.15.2) you can run Zelda: Breath of the Wild on the right hardware that is, at 4K and between 60-100FPS.
Cemu has been updated to v1.15.2 and has boosted performance to a bunch of titles, one of which includes Zelda: Breath of the Wild. BSoD Gaming has covered this with a gorgeous video showing BotW running at 4K and between 60-100FPS on an Intel Core i7-8700K and GeForce GTX 1080 Ti graphics card. The new version of Cemu also adds improvements to the audio, but the big thing here is that "all areas of gameplay" in Zelda: Breath of the Wild can be cranked to 4K at 60-100FPS on the 8700K + GTX 1080 Ti combo.
The above video is a great run through on how to get Cemu 1.15.2 installed and configured to run games like Zelda: Breath of the Wild on your PC. Now we just need Nintendo to make games for the PC natively, especially when they look and run this smooth. Imagine what games would look like with true 4K textures and assets. Oh boy.