The dudes at Phoronix are super Linux people (much more than I am) and they've uncovered some pretty incriminating evidence that supports the theory that Valve is making Steam available on Linux... maybe soon!
If they do this and port Source to OpenGL (done by releasing for Mac OSX), it could be the push that Linux needs for desktop gaming.
This may be the tipping point that many other companies and users will see for Linux gaming. Seriously, this might be it.
2014 is going to be a good year. More content, more streamlining. Be a part of history!