Electric cars are the future, and always will be.
And nuclear fusion power is only 20 years away...
For local runabout vehicles they'd be okay as long as people remember to plug them in every night or whenever they park them at home.
Hydrogen, if it could be stored safely, would be a better alternative. Easy and cheap to make. Of course a tiny reactor would be the ultimate if it could be done safe enough to withstand crashes and keep from blowing up a city block.
Sometimes I think about how far we've come in the last 120 years and wonder what it will be like in 100 years from now. None of us here will see it but there are babies being born today that will. We've gone from horse and buggy with all dirt roads to ev's and mostly paved roads in the flash of an eye.
I'd really like to see anti-gravity vehicles that use some kind gravity tech to hover 1-4 feet above the ground. Maybe that's what will be the next big thing in 100 years.