There are 250 million vehicles on American roads, many of them high-mileage commercial vehicles. Could we double their fuel economy by plugging them in?
It's a growing dilemma--conventional cars are getting so good it's hard to make the more expensive hybrid pencil out.
Automakers talk about 2020, but that's just an interim date--the car might take over sometimes, but you'll still be sitting in the driver's seat, paying attention. Fifteen years later, now we're talking about sitting in the back with your iPad.