I thought it would be cool idea if Kinkos or other copy places would have a projector pointed at a white table so that when you are about to print something they could show you how it is going to show up. You could have the paper sizes all marked up on the table (letter, legal, A4) so that you could choose the right size.
You'd have to calibrate it so that the projector would show the page at the right scale depending on the distance you put the projector. You could even hold out the paper under the projector to get a really good idea of how it's going to print out and I think you would get a much better clue as to this than seeing it on a screen.
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