There are far more people able to charge like you and me than there are cars and batteries. The ability to charge will magically appear long before we have enough cars to satisfy demand once people catch on.  
Do check out the benefits of VPP. It actually solves many of the current load problems. Pardon the pun. The point is the more cars with batteries the more likely they will be used to even out peak demand. 
Charge time are the holy grail.  Chances that charging will take much less time than gas filling is 100%. Just decide how much faster you want it to be. I predict 1000 mile range in 3 minutes in the next 20 years. 
Anyway, I’m shorting oil.