Did the likes of the Greeks and Romans have ideas about what future technology would be able to accomplish, in the same way that we discuss possibilities like holograms, flying cars etc?
Or was it just a case of someone using the current technology would come up with an idea of how to improve/invent something?
More can be written, but you might like to see the FAQ section "Imagining The Future And Futurism" (in the app, the # anchor doesn't work, so find the section about halfway down the page).
This is not to discourage discussion. Further questions, data, and debate are welcome.