Very much this. I happen to have both a low-end 4K tv for general viewing and a top-of-the-line (at the time) 1080p plasma for “movie night” viewing. There’s absolutely no comparison. The plasma is miles and miles ahead in every way. Contrast and black levels make way more of a difference than resolution, but that’s harder to market to the general public. I have above average vision (close to 20:10) so I can see a slight difference in the resolutions at 10-12ft viewing distances but that’s minuscule in comparison to the areas in which the plasma excels.

ETA: the low-end 4K is 50” and the plasma is 60”