So in real life doesn't that mean the pixel density is technically how many atoms there are in a given square inch or meter of a given surface? It is those atoms which interact with light and ultimately lead to us being able to see in the first place. Just like light shining through pixels or using liquid crystal luminescence to show the pixels instead. No pixels no image, no atoms no object.
I mean I look at a surface or object in real life and there is nothing jagged about it. Unless there are macroscopic deformities it can be as smooth as the person designing it has the skill to make it or the process has to make it naturally.
I wonder if we will ever have the computing power to basically plug in the fundamental laws of the universe and derive a simulation from the molecular or subatomic levels?
The Matrix basically.
Something tells me a leaf on a plant will always look a little "alien" if it isn't as finely tuned as that. I guess a bit like Neo sensing he was inside The Matrix for no real reason. I bet the Oculus Rift starts to make something like this apparent.