As a 20 or so year long linux as a desktop user, I've had my hopes up so many times that more people would embrace Linux. It's always been about the games, largely. Hell we had id's stuff running, and there was even a company porting Blizzard stuff if I remember right. This is the first time I've been genuinely enthused that "it's happenening", and I cannot be more thankful to the Wine team and Valve.
I would say it used to be about games. But now many people use laptops and Linux has pretty terrible support for most of them. It often "works", but you'll usually have some issue with bluetooth or wifi or the trackpad, and good luck getting anywhere near as good battery life as Windows or Mac.
I think Linux has been perfectly adequate for "browses the internet" level users for quite a while.