It is rarely difficult to tell when a movie was made. What seems futuristic today seems weirdly discordant and indicative of its time tomorrow. It has been said that 1984 was not about 1984; it was about 1948.

There are some few exceptions. Bladerunner and Alien, both made many years ago, still look (to me, at least) futuristic. They both avoided jargon and the scruffy, lived in look of the depicted worlds seem universal. I'm not sure that the same can be said of Star Wars. The upbeat tone, the shaggy hair, the almost-Western clothing of Han Solo and the faux-Eastern robes of the Jedi seem very 1970's.

The phenomenon was much more apparent in older works. Films and books from the 1940's and 50's seemed to assume that people in the future would look, talk and act just like them, and since they no longer do, it all seems rather naive and out-of-time.

It's a problem for science fiction that purports to be set in the future. One way of dealing with it is to invent everything. Don't have your characters look and speak as they do when the work is made. Have them look and speak and act like nobody has ever done, and they will always seem somewhere, and somewhen, far away.