> until laptops sold at Walmart or Best Buy start coming with Linux pre-installed as an option
If you want to see this, make sure your browser agent is broadcasting Linux[0]. Make sure you're using Steam in Linux.
But right now Steam has Linux at <3%[1]. It is more than OSX, but not enough. I do think above 5% and it'll start to be taken seriously, and 10% we'll start seeing moves. Linux doesn't need 90% of the marketshare to dramatically change the world. 10% is more than enough. Even 20% would be momentous and force both Microsoft and Apple to change strategies. Don't feel like there's no hope. Just because it is an unrealistic expectation today doesn't mean it will be tomorrow. And your actions today change the odds of what happens tomorrow. So don't give up.
You don't have to change the world overnight. But you do need to make steps in the right direction, even if small, to make the world move.
[0] You can even do this while using Windows! Hell, you can use Chrome and tell people you're using Firefox on Linux if you believe in those things but just are unwilling to make the switch yourself. The signaling still does something (it is better than nothing).
[1] https://store.steampowered.com/hwsurvey/Steam-Hardware-Softw...