Cemu is an experimental Wii U emulator that was initially released 10/13/2015 by GBATEMP user Exzap.
Breath of the wild is now officially supported by Cemu /1.7.5/! For more information and guides the Cemu reddit can be found here: https://www.reddit.com/r/cemu/
Offical Cemu discord: https://discordapp.com/invite/5psYsup
Get Cemu here: Cemu.info
These videos show the progress made by Exzap's development team.
The first video demonstrates Cemu 1.2.0 running at actual speed.
The second Video demonstrates a newer version of Cemu (1.5.0) running Mario Maker.
The third video demonstrates the latest version of Cemu (1.7.0.d) running with different games.