The Retina display..
I don't really understand what the concept of a retina screen is. Can you see it?
After looking at my 4S today, I think I saw the "Retina".
And now...I think I know what it is.
If you stare real hard for about 15 minutes while looking at the screen with both eyes wide open, you should be able to see the retina. I saw it once last November. It was awesome!!!!!