The Ion engines in Sci-fi movies and shows are definitely fictional though.
Everything in sci-fi movies and shows are fictional. The "fi" is short for fictional.
Everything? Cars? Buses? Aeroplanes?
Yes. It's fiction. The people, situations, etc aren't real.
Sometimes they allude to real events and people. Lots of those in the "Back to the Future" movies: The Texaco gag, the Jaws movie gag, etc.
There is no Jaws 19. It's fiction.
There's no robotic Texaco station either. But that's the gag. It's an *allusion* to current events. You wouldn't have gotten the joke if they had invented a different movie instead of "Jaws."