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My opinion has been that the real SciFi are extremely unpopular work. For example:

Packet switching was a very unpopular idea by Paul Baran [1], which was invented to be survivable under nuclear attack. Similarly, the theory foundation, queueing theory by people like Leonard Kleinrock [2].

And for anything people imagine to be futuristic or Sci-Fi, it's almost always a clever usage of some foundational tech that has been unnoticed for a long time.

[1] https://en.wikipedia.org/wiki/Paul_Baran

[2] https://en.wikipedia.org/wiki/Leonard_Kleinrock

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