Like was there anyone that wrote about technology that didn't exist but could exist in the next 30 years in their time. Like in the Roman empire was there any stories describing technology that didn't exist in the time it was written but did exist later? Or is science fiction truly a modern concept.
I believe these answers address your question: https://www.reddit.com/r/AskHistorians/wiki/science#wiki_imagining_the_future_and_futurism