It’s been a trend for quite a while for non-linux people to dump the PC entirely in favor of using just phone.
Can’t do that if you play games.
Also that’s half of the reason Windows hasn’t lost the war on home desktop PCs yet. Another half is office applications.
Actually, these are thirds.
Another reason making me say so is that no major user-friendly distribution wants to be just that, they all have a particular madness with no good reason for it.
So I don’t know what to recommend, there should be something off the top of my head, but that’d be “just install Debian, it’s fine”.
So, any single reason of these going away would accelerate Linux adoption notably. Any two would make it a trend visible to housewives. And all three would resemble the flight of ICQ users to Skype.