I remember a job in which I had to correct all images of a book because the person who had done the images first was working with a screen that was too bright…
@mikemyers, if you want to roughly see if an image is going to print well or not, you can hold an unprinted piece of paper next to a white area of an image. You can then possibly see that the screen looks much brighter than the paper… A printed paper has no backlight 
Also, max. contrast is much higher on a screen, say 1000:1, which is roughly 10 stops…