Hah. You may have accidentally come up with the new "this is the year of Linux Desktop".
"Five years from now is the year of Linux gaming being financially relevant short-term" doesn't quite have the same ring to it, though.
Honestly, I don't have any predictions on this. So much is riding on how hard Valve is willing to invest on becoming a OS company and how receptive end users are to it. Right now the outcome falls somewhere between "Steam Machines" and "Nintendo Switch", and I genuinely don't think anybody can predict where in between it will fall yet. At the very least we need to see what happens to the Legion Go S and SteamOS adoption.