[naravara]

There's a lot of 1960s SciFi where future people are planning out interstellar travel routes with slide-rules. Even "The Foundation" series posits that basically all cool technology in the future is going to be based on mastery of nuclear power.

We do a bad job of extrapolating where the future will be from current trends. The frequent breakthroughs in physics and industrial, precision manufacturing of heavy machinery around the mid 20th century eventually slowed down. The remaining problems got too hard to make major leaps and bounds improvements on at the same pace, and the desire/value to keep pushing on it slowly faded. It' still there, but a computing revolution happened instead.

There's no reason to think the future revolving around improvements in networked computing is going to go on forever, we just don't know what the next "thing" is going to be. I'd argue most of the benefits of having the internet readily available at all times in all places are basically already realized by smartphones and anything else is mostly just going to be a refinement or intensification of stuff we already know. It will not be transformational in the way smartphones were. It's on a similar arc where the leaps-and-bounds improvements are harder to come by and it's not clear what we'd do with them when they happen. Gone are the days when anyone would notice a performance improvement in their day-to-day computing tasks from having a cutting edge CPU or GPU. Advancements are increasingly only useful for more niche use cases that refine and improve what we already have rather than dramatically altering the way we work. Faster mobile data is cool, but it doesn't change the way you use your phone and neither will a more immersive computing interface markedly change how you do the tasks you use a networked computer to do.

I don't know what the next field that undergoes such revolutionary change will be. If I were a betting man I'd put my money on major breakthroughs in biomechanics and life sciences, but who can say for sure?