All that would be true if we had enough spare generating capacity and sufficient grid infrastructure to distribute it. Cars currently consume as much power as the entire present capacity - about 45 GW.Nope. If we had 35 million electric cars, that would be an average power of 7 GW:
~5 kWh/car/day times 35 million cars = 175 GWh/day. Averaged over a 24 hour period, ~7GW
Meanwhile average power demand is about 30GW. Nothing like double.
I mean, yes, sure, if your point is how disastrously inefficient and horrifically polluting current fossil cars are, you've certainly proved your point!