Someone smarter than me noted that most science fiction has badly missed the mark of what the present and near future will look like b/c the assumption was that power sources would trend towards zero cost ("too cheap to meter") and that this would enable all sorts of interesting world altering gizmos's like jetpacks, flying cars, physics defying spacecraft etc.

What actually happened is that communication density exploded upward (pony express, telegraph, radios, phones, industrial printing, computers, etc.) at the same time that communication cost plummeted (aka I'm paying a flat rate for internet access and video chatting with people all over the globe).

And I think this is still the case, that we generally still look down on communications as a kind of lesser technology compared to power gizmos. When if anything it should be the opposite, that the ability to communicate so much more effectively across all of humanity has smeared the ideas and inventions around much faster and more thoroughly than anyone really considers.

Why did things take so long? Because everything had to be individually re-invented, we had no shoulders of giants.