@Ana1234 - Well, personally I think one of the best science fiction-esque uses for infrared is night vision glasses and cameras. I mean, this was something that kids once dreamed of as a super power, that we can do with one trip to the electronics store.
I guess the problem with it is that the average person soon realizes that there aren't that many uses for this kind of technology at home. Most of the time you're just going to want to turn on a light anyway.
The only innovative thing I've ever seen done with an infrared camera was a guy who set it up to spy on the neighborhood cats who were coming to do their business on his garden. He attached it to a motion detector that shot water at them whenever they tried (and filmed the whole thing).