Well, what's most likely to happen is what's happened in the past. Those who wish to spend the money form the leading edge of new-tech consumers. I've been on the highways of California and noticed the sleek Teslas gliding through traffic, and I've noticed people noticing them. I've seen exactly one Tesla in Anchorage, and full of old fashioned ideas of how things get done, I followed the car until I had an opportunity of asking the driver who owned the Tesla dealership? Silly OLD me. You buy them off the internet!
And what will really sell them in America is that electric motors have ultimate low end torque and, if made properly will be extremely low wear and maintenance, kinda the motor equivalent of the LED lightbulb (although my bedside LED lamp just died). Whether powered directly by batteries or fuel cells, or hybrid, electric motors will have their own appeal.

In the northern climes, or for anywhere that still gets cold after the planet has warmed up, there will be a slight electric disadvantage in that it is expensive to use electricty as a heat source. Reason being, unless you're using hydroelectric or nuclear sources for your electrical generation, chances are high in America anyway that you've burned something somewhere for that electricity. So using electricty as a heater source, although typically safe and clean, means that you've burned fuel to be turned to electricity to be turned into heat, when you could've simply burned the fuel for heat to begin with. Nevertheless, for a large part of the modern world, the freedom from exhaust pollution in crowded cities and suburbs and the ability to charge one's vehicle overnight when the electric rates might be lower will be liberating.

Also, in theory AND practice, movement through electric motors will be more efficient than through internal combustion and transmission systems. There are even some electric aircraft on the market.

Now, everyone should know that you don't use technology without tradeoffs. One of them will be that the damn things are way quieter than traditional auto engines. It will be easy to not hear them when you're crossing the street reading your phone....So there will have to be car announcers that are always on if the engine is on and the vehicle is moving. You can have the traditional back-up beep that so many trucks and delivery vehicles have, plus a somewhat smoother or purrier sound for forward motion. Maybe even a warning rattle for 'not moving, but not off'. And the approaching car might be able to bluetooth you on your phone you're reading and warn you explicitly to get out of the way. Or it could slow down while your phone prepares to file a suit in preparation for your anticipated injuries.

And like I writted earlier, for certain maintenance or repair the electromechanic will have to go through a grounding procedure before sticking his low-resistance digits where they might be fried off (in the electrical business the technical term for this effect is 'crispy critters'). And batteries under impact may short out and lead to electrocuted people and flash fires. Likewise with fuel cells.

It's a Brave New World all over again.