I love Linux. In fact, if I could reliably get my Windows games to run on them, I'd drop Windows like a bad habit. It's faster, it has more user support, nearly every program for it is free, and there are about a thousand different flavors from which to choose. (My personal favorite is Mint.)
While gaming on Linux is still way behind gaming on Windows, it seems like Valve's SteamOS and Steam box hype is working out for them. Earlier today (3/5/2015), a huge SteamOS sale launched, and just look at some of those titles: Shadow of Mordor, Saints Row IV, and Batman: Arkham Knight have been announced for Linux, as well as some heavy hitters that were already there, like Borderlands 2, Borderlands: The Pre-Sequel!, and Civilization: Beyond Earth.
I will never, EVER buy a pre-built, overpriced-yet-underpowered Steam machine, but I desperately want them to succeed. The more people who really buy into machines that run SteamOS, the more popular Linux gets, and it looks like that popularity is already starting to build. There are more triple-A games on Linux now than there ever were in the past, and being able to run them all on an OS that's completely restriction free makes me giddy.