mlee 2500 :
Should be great if all you do is play games (or watch video) while sitting MORE than 3' or 4' feet from you screen. I predict it would be awful for anything else, unless you like repetitive-motion neck injuries or enjoy awful pixel density.
As someone who uses a 65" 4k TV for their main pc monitor, you are wrong about neck issues. Sony recommends a viewing distance of 1.5x the VERTICAL height of a 4k TV, not the diagonal that is typically used for 1080p. That comes out to 3.92 ft for a 65" TV.
https://us.en.kb.sony.com/app/answers/detail/a_id/30964/c/65,66/p/61659,95543,96663,96664/
I have my TV on a stand against the wall with the bottom of the TV level with the top of my desk which is a couple ft away from the wall which places the TV just under 4ft from my seated position and I could not be happier with the setup. Text is razor sharp with no windows scaling necessary. Obviously having a 65" TV on your desk 2ft from your face would be impractical. Moving the screen 5 or 6 ft or more away would require most people to need windows scaling to read text which defeats the purpose of getting a 4k screen and often looks terrible.