Average visual acuity for young people is about 0.7 arcminutes, best being around 0.5.

There seems to be disconnect about how people are consuming media. For me holding a 2280x1080 6.3" phone ~8" from my eyeballs is a natural viewing distance and I can see the full resolution without difficulty. And at least from my point of view a 65" TV is also a pretty typical size.