That's interesting. More developers keep adding Linux, it's the way to go. And although it is ironic that Valve/Steam is taking the lead in Linux support, I am at least glad someone is doing it.
Before SteamOS, many people would demand proof of high profile games appearing and being playable on Linux. Now that a company is offering some form of support and a Linux gaming distribution, people claim that we're only supporting a monopoly (as if Microsoft wasn't one...). Valve is providing the support game developers needed to make the leap. This is great for Linux gaming in general, not just SteamOS. How hard is it to understand that?
In any case, Steam or not, I am glad Linux is receiving more attention. Next thing is convincing these devs that DRM is not the way to go.