I see this as a bit of a gamble. I'm not sure the grid gets to where it can sustain all the plug in cars as fast as the manufacturers want to build them. It for sure is not going to get there all on renewables.
But the E car is like god-send to the auto companies. Gets them out from under the EPA, decouples them from fuel standards issues, simplifies the manufacturing tech, reduces parts count, increases reliability. It's all positive from every direction. So their enthusiasm is no mystery.
OTOH, they (except Toyota) hate hybrids for almost all the same reasons - but that doesn't mean they may not still be a needed transitional piece of the puzzle.