there is so much Media today about what future technology might be, did ancient cultures such as the Romans ever speculate either through predictions or stories of what technology they thought might be created in the future?

by RxEko_ffs
othermike

This comment by u/publiusclodius (from the FAQ) covers differing Roman ideas about what the future would look like.

Also, while it doesn't exactly address your question, you might be interested in u/mythoplokos's comment on the Roman concept of technological progress, which wasn't quite the same as ours.