It has been raised that EVs burng the same amount of fuel as direct gasoline consumption to provide the same amount of energy, though that is not exactly true for a number of reasons. One is that generators in large power plants are much more efficient as they must only run at a steady speed, compared to car engines which must handle throttling, they also can recapture waste heat using steam turbines in many cases. In addition, charging would happen at night, when many plants are simply sitting fairly idle anyway, so the marginal cost to charge overnight would be very low compared to gasoline fuel.

The main limitation for EV is range given the occasions it's necessary to drive on an away trip, or for a long trip. What I believe would be a good thing to do is have a good EV car with a built-in backup generator (those trailer things are too tacky... sure it would add some weight, but not too much) so if you're running low, you can refill on gas to extend range. That would be excellent as a commuter car.

Another idea would be to do a true hybrid (gasoline also directly powering wheels rather than just a generator) where the engine just supplied the necessary cruising power, with plug-in (or engine-charged on long trip) electric handling the rest. You could also force all EV mode for short trips, and have a 60mpg car (assuming no grid charge) or so for long trips.