I think computers save more paper than you know. How many people view this site every day? If it were not for computers, each person would probably be viewing content that is now on web pages, in a magazine. How many people don't get paper magazines / newspapers anymore because the content is available on MSNBC.com or CNN.com for free? Also think of all of the trade magazines, catalogs, and pornography! All of that stuff has moved online now, for the most part.
(sorry to go off on a tangent!