That was rather my point though.
Read what I was saying rather than "riding to the defence" of 1080p gamers.
When any modern graphics card can do 1080p half asleep, it doesn't really need any work optimising for. It wouldn't matter if 99.9% were still suckered into staying 1080p, if the graphics hardware will do it with it's eyes closed, it's time to move (engineering hours previous spent creating 1080p optimisations) on. The folks playing at 1080p with a 5.4ghz Intel chip pumping a 1080 with enough instructions to not be sat at 30-60% idle are into vanishingly tiny percentages.
I'd guarantee 200+ fps@1080p is a smaller market than 4k.
The vast majority are on 1060's or below at the minute, even then, pretty much anything they buy (new) from now will absolutely knock 60fps 1080p out of the park without even trying. There's no need to spend effort "optimising" it. It'll just have the GPU sat doing even less work.