Its an actual term
It's a phrase coined very recently based on a misconception, and happened to be picked up by some online publishers. That's all.
Saying "its an actual term" [sic] just attempts to give it an air of legitimacy, without actually meaning anything.
The phrase itself is not only ignorant, but also insulting. The gamers it refers to are not Baby Boomers, but Generation X, which had nothing to do with the damage to society that Boomers are famous for and most of us in younger generations are suffering from now. (Housing crisis and out-of-touch legislators, for example.)
Congratulations!
For those who didn't notice that OP posted 2 links:
(They look like a single link because there's nothing separating them.)
https://store.steampowered.com/app/2021600/Game_Over__A_Musical_RPG/