Are you sure that actual best selled monitors / graphic cards combos run at 1080p well for gaming?
Of course a gamer with a good budget will use a SDD and a Intel i7 with a high end ATi or NVIDIA GPU, but most home computers used for casual gaming go better with 720p and not that good hardware.
And I do like to read game benchmarks for "normal" budget users, more for this new chapter in the future Steam for Linux games, being Ubuntu home machines, normally equiped with old hardware or less powerful hardware performing better than MS WOS for most tasks and perhaps even gaming.
And of course AMD and NVIDIA blobs are a handicap, if they were open source or at least modular and most parts open source and some - patented - closed, the gaming experience with better drivers for Linux will improve.
Last but not least, in FPS games, at least in old Q3 times, pros used to put minimal settings to better aiming and liked to use 120 Hz and limit to 120 fps with 800x600 and even lower resolutions with that time high end machines. I remember some pro cfgs - I never liked to play that way - where Quake3 appears almost without any decoration.
PS: And we will have to add to this benchmarks soon ARM SoCs, Samsung has an intereesting new cheap ARM chromebook, Ubuntu TV for ARM TVs will be soon out there, and OUYA too, and this vs MS WOS 8 RT benchmarks will not be able to be done even at 1080p for a good gaming experience.