Comment Re:It's not quantity it is quality (Score 1) 252
What many people miss out is that many middleware libraries these days allow for easy porting between Linux, Windows and OSX. Most big titles aren't locked to a single platform, either. GTA V is out for both XBox 360, PS3 and PC. That means there is an OpenGL version and any Windows-specific functions are hidden away in a software abstraction layer. That in turn means a Linux port (as in, get the damn thing up and running on a Linux box) is not only feasible, but could probably be done by two programmers in one months' time.
There are also a bunch of promising kickstarter projects, nearly all of them promise a Linux port these days. Games like Planetary Annihilation[1] or Mighty No 9[2] have got Linux ports out of the box and would be available on Steambox with 99% certainty.
So, yes, while there is a cost to porting, it's not half as huge as it used to be and it gets smaller all the time.
[1] http://www.uberent.com/pa/
[2] http://www.kickstarter.com/projects/mightyno9/mighty-no-9