

If my quick calculations are correct, the 70 inches screen at 1080p has a pixel size of about 0.7 mm give or take, where 4k would be about 0.1-0.2.
0.1mm is a smallest size of a thing a human could potentially see under very strict conditions. A pixel smaller than a millimeter will be invisible from a meter away. I really, really doubt its humanly possible to see the difference from the distances a person would be watching tv.
The thing is, the newer 4k tvs are just built better, nicer colour contrast, more uniformed lighting, clearer glass, and that might be the effect you’re seeing

Right? “Yeah, there is a scientific study about it, but what if I didn’t read it and go by feelings? Then I will be right and don’t have to reexamine shit about my life, isn’t that convenient”