It's kinda funny, the idea of people downloading a PC game on a tablet. However, it would be cool if there was an emulator where you could play PC games on mobile.
Also is this a big thing? Are lots of people doing it?
Yes, It's some funny to see someone with an stupid face who download in a wrong way a PC game on his phone/tablet, it happens many times in simple games of free download, in which although they take a version for Android, it also have the version for Windows, and this people that was download the Windows version in the wrong way on his Android phone/tablet, they will have confused it in an epic way to the Android version.
The big problem with Windows emulation in Android, is that there is a lot of fakes and misinformation about this theme (Wine for Android wasn't updated since January 2018), but there is another way to be able to play PC/Mac games on Android/iOS, the Streaming, but it's not worth it, because you need to pay a monthly subscription, a very good Internet signal and mandatory, the screen is filled with so many buttons that your fingers will cover almost everything, and nothing game will be your property.