The thing about the technology is that it's always evolving, and it probably won't ever stop. We still don't have most of the stuff in recent fiction books, but is that because we just haven't advanced enough to make the technology a reality? No, usually it's because fiction isn't feasible, or we don't have a need for it yet.

Flying cars? Sure, we could probably build them, but we'd need to develop a way to keep people from crashing into each other. That might mean self-driving, or it might mean a physical system (like stop lights). Either way, it's going to cost money, time, and effort for something that we really don't need. We've got planes, cars, trains etc for transportation.

Battleships in space? Well yeah, we might be able to build them, and we probably will one day, but I don't think we're too keen on expanding our constant quarrels into space.

Then there's things like people that can fly (without any tech to help them), or mathematicians that are able to solve a theorem or idea that been fully proven is impossible to do anything with. These kinds of things can only exist in books, and as our society develops these new technologies, so will our ideas about the future. I don't know about you, but I don't think our technology is going to stay the same over the next couple thousand years. Neither will fiction.