Could be wrong, but nowhere have I seen a vid that looks like it's pushing visuals to where it should be lowered this much.
Has probably more to do with the engine being optimized for these resolutions at these frames. It seems to be either 900p60 or 1080p30
SW BF, Battlefield games, Mirrors Edge are 900p60
Dragon Age Inquisition, Need for Speed are 1080p30