Important Question:
I've pondered this a few times, and it's a shame if this is true:
Do you feel we're probably discovered/invented everything, really basic and fundamental that we ever will, or will for a long long LONG time?
Right now it's feeling like all the new things we have and are looking forward to are just engineering challenges, nothing really fundamental.
Things we see in the movies, like Anti-Gravity, Time Travel, Faster than light (warp) speed, Teleportation, are just not possible.
We'll get better cars, planes, food, phones, AR glasses, health etc, but it's just fiddling with stuff we already know.
We have Microwave ovens, Internet/Computers, we learned how to fly, and a rocket in space (which is just a fancy Chinese firework really)
The only thing I can think of which would dramatically change things from a fundamentally human perspective, and one that I'm sure it 100% possible is feeding the brain with signals directly as opposed to via our sensory organs.
That's doo-able for sure, it's just working out exactly how.
Much like AI, also possible it's just making it good enough to be convincing.
But Anti-Grav? You can't invent that. And I can't see it's a lack of understanding that's stopping anti-grav either