Yeah, most of the time when I get asked for windows help it's with the subtext that windows is just a piece of shit OS that gets in the way of what they want to do more often than not, and it's like, Linux at this point will handle 95% of what you want to do. As you said, Gaming, at least with newer and mainstream titles, and web browsing are easy money, word processing/spreadsheets are mostly covered with LibreOffice and the like. The GUI's a little different but the fact that most distros have one is enough to convince a lot of people to switch.

The professional world might be stuck on Windows for a while just because it's the norm and most businesses want plug-and-play, but there's few reasons for personal computing to live in Windows anymore.