The Nintendo Wii was an extremely popular games console, it didn't focus on having the best graphics or computational power but rather being the most fun and engaging. A YouTuber "Shank Modz" decided it was time to create a smaller more portable version of the Wii. He emphasises that this is a real Wii and not an emulator, he also explains that the project took a year and was a miserable task to complete but it had to be done. You could save yourself the time and effort by just get yourself a Switch but that wouldn't be as fun would it!
You can see the full build log for the project here.