Yeah, I'm sure thing will develop and change beyond our wildest dreams in the future, just like the first cars went from basically horseless carriages to today's super cars. A gasoline engine was thought to be powerful if it produced 20-30 hp, but now your average is around 200 hp. Who knows, maybe the Jetsons were not too far from reality.
Our future is a lot closer than most of us think. It's that goody time perception thing. When you are young, everything that happened before you was slow and glacial in its progress...50 years of history was like eternity. But when you hit 60, or near enough, the last 30 years seems like it flew by.
I still don't really feel old at 58. I look at tech development with this in mind: my grandfather was born in 1915. Biplanes, horse drawn wagons were still the norm for many, no radio, more often than not, you had a well for water.
By the time he was the age I am now, we had put men on the moon, television was everywhere, Al Gore had invented the internet (actually it was DARPA, but thanks to the internet people still think he actually said that...), and the template for the modern supercar was already in production.
Just 58 years. And we're accelerating our development. Compare a 70s EV with a 90s EV and then a current EV.
They are just getting started.