A good start but still long way to go. I guess we still have to wait big AAA games for Linux for a while especially from bigger publishers (EA, Activision) but I'm glad that so many Kickstarter games are going to be released for Linux (Steam)

I'm running my gaming Linux from hard disk over USB3 which works perfectly. I made a bootable USB stick which boots directly to Steam "Big Picture" UI - works without problems as well.