Well, since Steam is the only gaming platform available on Linux, and since Steam is sold as a system based on linux with its own Linux distribution, SteamOS, and since Steam have its own version of Wine that magically runs Windows games on Linux, I would say that this statistic says nothing at all.
It would be difficult to get the mainstream vendors to match this initially, but I suspect the Linux focused vendors like Pine and System76 would do so fairly rapidly.
The way to convince the mainstream vendors would be what's attracting them to release Linux support right now. The popularity of Linux devices for people who want to work on the same machines they run their servers on.
Like I said though, I'm not sure whether this idea is workable or even makes sense.