Having a cheaper electric alternative to a gas auto with similar or better performance will quickly make gas vehicles seemingly "unaffordable". Very few Americans will stick with a combustion engine if it is the more expensive alternative.
In other words, gas prices don't have to rise, electric vehicle prices need to continue to fall. Which they will.
I could drive much less (I drive below average miles anyway though) and I could get a much more fuel efficient car. I'm not going to get a house with a car charger, so it's unlikely I will get a rechargeable car, let alone one that is fully electric. My apartment complex has one charger for hundreds of units.
Incidentally, there is a charger near the gym I go to and I noticed that it does not display the price in advance. If regulators do not force electric car chargers to show prices like gas stations do, it tells me nobody is serious.
If electrics get down to the price range that apartment dwellers are buying them, you can be sure that the number of chargers will increase dramatically.
As for charger pricing, most chargers I see out in public are free. They don't display the price of gas in Venezuela at gas stations because it is too small to account for.