Recent article in "The Atlantic" states "Your TV is too good for you", that 4K resolution is a sham.
Nothing could be further from the truth. sour grapes from a reporter that doesn't want to spend the little extra for 4K.
I'm going to be honest. I can't really tell the difference between HD and 4K. I have an 85" Sony (top model at the time) and have watched several shows/movies in 4K and I really couldn't care that it was 4K.
And I was one of the earliest adopters of HD. I remember the first HD sports I saw was the Daytona 500 around 2003/2004 and I had strung an antenna off my deck to be able to receive the broadcast. I had friends over and it was a party. We moved in 2005 and I didn't bring any of my SD TV's with me. Got all new HDTV's including a 720p plasma that had the best picture of any TV I have ever had to this day. Great pic, but it was basically a 400W space heater in the living room and had to go.
I have a 4K BR player and the only 4K content I have watched on it was Top Gun: Maverick.
Maybe my eyes are too old (not quite as old as yours ), but I really can't tell the difference.