Workstations are used at work, which is the main gist of my comment above.
Linux has picked up the low hanging fruit, i.e nerds and gamers who have actual computers at home. It wont win over some mythical "everyday home computer user" because they dont exist anymore.
For Linux to truly "snowball," it needs a serious, fully seemless office replacement that has to be better than "odt by default" libreoffice. Until it can pick off the office clients, it will not win.
Still, it doesn't need to. Pick up that nerd/gamer/granny dont care how she gets to chrome subset. That's fantastic for linux, and will still drive innovation enough.