Whenever you get into your car and drive somewhere; you always have to think about how much gas there is in the tank. The thing is, that aspect is all people want to think about other than plugging in and un-plugging from your high performance charger plug. So, until gas operation alone will give adequate range and performance, (whatever that is) these things are too much of a nuisance. Local use only...remember which car you are in. Yet for some with minor usage a boon no doubt. Not many I think and the lesser hybrids might also be better for the same few, even though minor battery range is present.
I think that the Volt is closer to being volume viable here but a higher body closer to the BMW style might be more appropriate. Forget the Gull Wing doors and AWD is not indicated for an ecco electric vehicle I think. From what I read here, even the volt is not a preferred vehicle for the highway.
I am thinking that the electric charge should be a bonus and not the be-all of the system. Other than plugging in perhaps, you don't want to have to think about it...you get whatever is in the battery. Mostly a lot but sometimes a little. Whatever, the car still has to be viable sans charge.
Getting electric charge out of the windmills and into the car batteries overnight is the thing to aim for and only volume usage will be enough. Which means affordably priced equipment.