A number of things have made it from science fiction to real life. Electric cars are here. The self-driving cab from Total Recall is almost here. And I am hoping the light saber will be here someday.
To be honest though, I haven't quite figured out how they are going to make that work. The light saber is a blade of light that can cut through anything except another blade of light, at which point both energy blades become rigid matter swords.
And here is an interesting one. Not too many science fiction authors managed to predict the mobile phone. Most presumed ubiquitous wall receptacles or connectors that protagonists could plug into with a wired device. One popular series however got this right, Star Trek's communicator. The Star Trek Communicator eventually made it into our hands as the Motorola Star Tac.
Good call Mr. Roddenberry.
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