Do you mean a same game running at Full HD or 4K should be enjoyed in a different way or not ?
No, you were talking about the desktop experience. I'm suggesting a possible scenario where someone is using an HD desktop but told it's 4K, and someone else is using a 4K desktop but told it's HD (making sure to change icons, fonts, and such to account for the different pixel densities) and then you simply ask them to rate the experience. Scale from 1 to 10. Do this many times, different setups, get a bunch of data with some nice averages and see where the plot lies. Do people consistently rate 4K high whether they are told it is 4K or HD? Or do they rate "4K" better even when it's actually an HD screen? Not a direct comparison, asking someone which is better, screen A or screen B, just an aggregate set of numbers from different groups to give a general picture of opinion.
why would you not want to have higher resolution rather than a lower one ?
I never said otherwise. You're the one who said people complain about having to use HD screens. I'm just trying to come up with hypothetical experiments to figure out if that's because 4K screens are perceptively better or if there's a stigma of "this is supposed to be better so I will say it is better" the way there is in audio quality.Now there is definitely a difference, and there will be people who actually work with 4K screens that genuinely need that extra resolution who will definitely notice that it isn't there when they try to work with it, the same as those that work with audio recordings (often) need the higher resolution of 24bit when doing their work, and if we were to run this experiment we'd definitely see some marks which always rank the 4K high and the HD low, but whether these ranks are outliers or part of a trend would be interesting knowledge.
I remember reading a study about a year back which asked the same question regarding 30, 60, and 120 FPS and was pleased to find that there was a huge jump in "appreciation" from 30 to 60 FPS, but the 120 FPS was all over the place with some people saying it was good, others saying it was bad, some saying it was bad even when they knew it was supposed to be better, and that's a fascinating result. I want to know the same thing with 4K displays, specifically as it relates to the desktop experience, like you say.