Quote Originally Posted by batwister View Post
In short, the retina display tricks our eyes into believing the image on screen is better than it is, but it doesn't trick optics which have to see through the screen to focus on the image/pixels..

There is no trick or magic about the retina displays - it's just that the pixels on the display are small enough that the eye can't resolve the individual pixels. Blow the image up to a larger size (with an enlarger or whatever), and the eye is able to resolve the individual pixels.