> If I may suggest a few myself:
>
> - (for pre-internet writers) Did you envision a future with global networks open to public access, advanced cybernetics and virtual reality, but with no equivalent of e-mail?
>
> - Is your parallel dimension or alternate reality almost identical to our universe, but ruled by a tyrannical, fascist police state?
>
> - Did you write a story where time travel into the past is believed to run the risk of altering the future, yet is permitted for recreational purposes?
>
> 10Kan

With just a minor subject change, I want to mention those sci-fi movies in which sound travels in a vacuum. You hear the explosions, and spacecraft make a whistle or a roar as they pass. It's even in 21st century movies.
Howard