Oh, there was another thing I was thinking of when I read Hanne's article, which was how I sometimes say that if you really want to affect future technology, become an art director for a classic SF film/series (of course, guessing which ones will become classic is the heard part); then people will have the image of your gadgets in their heads when they invent the real stuff, and will make it look like your fictional tech (sort of like Galaxy Quest).