I speculate that a lot of sci-fi reflects the cutting edge of science and technology at the time it is written. For well over a century a lot of that frontier was transportation: and we got "Around the World in 80 Days" and "20000 Leagues under the Sea" and then a lot of books about space. We also got "Canticle for Leibowitz" and other post-apocalyptic books out of the age when nuclear weapons and energy was top of mind. Then, in the 70s and 80s computer technology became the center of innovation and we got cyberpunk and a lot of sci-fi turned inward to virtual worlds and the like. Given we're in a new space age, maybe sci-fi will start to follow? I'm certainly seeing a new wave of AI centric fiction.
I don't see how anything substantive has changed vis-a-vis space. There are some hard sci-fi recently, like the Expanse, that tackle a more realistic space expansion. But fundamentally nothing has changed tech-wise in space technology since chemical rockets, at least not for people-sized space-endeavours.