Study Boldly Claims 4K And 8K TVs Aren't Much Better Than HD To Your Eyes, But Is It True?
The rare exception to Betteridge's Law.
But yeah, this matches my experience. I can tell the difference between 1080 and 4k from my couch if I work at it, but not enough to impact my enjoyment of what I'm watching, and definitely not as much as the difference HDR makes.
Even at computer monitor distance, running a 4k monitor at 1440 with high pixel density is probably going to be a better experience than wrenching every single pixel you can get out of it. Framerate is better than resolution for gaming, for the most part.