GADGETS: TV SHOWS ON DEMAND

Imagine being able to watch hours of your favorite shows, back to back, without sitting through a single advertisement. A "personal TV" box, such as the recently announced TiVo and ReplayTV systems, will let you do just that. No VCR tapes, no complicated programming codes, just hours of couch-potato fun! Where did personal TV come from? Is it here to stay? When can you buy one? Find out here.