While I respect your enthusiasm and optimism, like all stats those can be interpreted as you wish if you want to be selective. For instance, just Windows 8 users alone, an OS which has been roundly bagged in the four months or so it has been on the market, actually "eclipse" Mac and Linux users combined and has a faster growth rate as well. Not to mention that most of the games ported to Linux Steam have been either indie titles or very old titles (like 10 years old). Some of them, like those from Frictional Games were already on Linux. So what has been made available through Steam may be convenient, but is hardly game changing just yet. 

I agree that we don't need to be pessimistic about the future of Linux, but hype is hype and can often be more harmful than helpful if one wants to be taken seriously.