Beyond resolution, sure there are other factors. But if we only talk about resolution , 4K reaches the limits of the eye at around 1.1 meter [1], and most peop

Beyond resolution, sure there are other factors. But if we only talk about resolution , 4K reaches the limits of the eye at around 1.1 meter [1], and most people sit farther than that from their tv. But usually at display demos , they let you sit closer to the tv , this and other factors (compression, placebo, framerate , maybe brightness , etc etc ) might help create better experiences or illusions/salesmanship with 8K. Another option is for rare few maybe the retina limit is higher . [1]please use this calculatoe physiological limits of eyes r to see thhttp://isthisretina.com/ http://isthisretina.com/