Intel Is Preparing a Major Restructuring of Their Graphics Driver
phoronix.com
phoronix.com
If only more discussions about software architecture were that honest.
Overall I'm somewhat surprised by painless gaming on Linux has become. I switched back to Linux on my personal computer after a number of years of primarily using Windows because of gaming. I thought it was going to be a pain point for me, however a few months later Steam announced the Steam Box and promoted Linux gaming heavily.
I (finally) have a beefy rig though, so perhaps Linux ports get bottle-necked more easily. I haven't measured input latency or anything that would be relevant to the competitive CS scene, but the framerate is higher on Linux than it was on my (now gone) Windows partition.