Also, one of the things that was cool in the 80's was MS-DOS. I mean, Bill Gates was a genius. He made people shell out $30 - $40 for what was essentially a blank screen with "C:>" on it. Sure, around v5.0 it actually DID something, but remember the olden days of DOS, back when you couldn't do diddly squat with it.
Also, the 80's was the era of the text adventure. Yes, text adventures started in 1978 with Zork, but the 80's had Beyond Zork, The Lurking Horror, Wishbringer, Amnesia, and a whole bunch of others.