Who here has a 1080p phone? Have you ever actually tested to see how small a single pixel is? I just did, I'm very impressed with both how tiny it is, and the fact that I was even able to see it!
Here is a quick picture I made in paint, on the right is a 7x7 square, then each square to the left is one pixel smaller, until you reach a single pixel dot. (to view original image, right click, and change ku-medium to original.