This has zero relevance to the images I have posted which are static computer generated images, intended to be displayed 1:1 on an LCD, rather than video or images captured at a higher resolution than the display.
It also has no relevance when upsampling to 4K, because you are starting with a source which has less than half the resolution of the display.
This is actually why some people involved in video production have said to me that you're technically viewing an aliased image when watching video 1:1 mapped on any display - because it exceeds the nyquist limits. They can make a case for that if they want to, but I think it's an interesting perspective.
Looking at those two images I have posted - regardless of whether you think it's too close to the display, whether you would see it at your "normal viewing distance" or whatever else you can come up with - would you not agree that the underlying image is clearer on the higher resolution display?
It may not look as sharp (which is more of a photography issue than anything else) but would you agree that the actual text and images are clearer due to the lack of a grid over the image and lack of color fringing caused by the larger subpixels?