Detroit Goes for Electric Cars, but Will Drivers?
nytimes.com
nytimes.com
A hybrid provides some advantage without removing "conveniece" -- which I would argue most consider necessary features. If it is a plug-in hybrid, all the better. Diesel provides higher fuel efficiency and the ability to use a better biofuel than ethanol.
Small cars would provide greater fuel efficiency with existing designs, but I think that, in the absence of STRONG pressure, there is only so small that U.S. drivers will go.
Electric battery exchange would require an entire infrastructure that doesn't exist. And if there is not a single standard, there is no way "gas" stations would manage it. Further, it would be more labor intensive than pulling up to a pump as swiping your card through an electronic reader.
From the U.S. manufacturers in the U.S. market, the hybrid Ford Fusion (I think that is the right model line) is the only viable next-generation vehicle I've seen. Perhaps the hybrid Ford Escape belongs in the grouping, too, although it's absolute fuel economy is not that great. (But if you still insist on something that big and SUV...)
There will always be niche markets. To me, right now it appears the Volt fits into that category, at best. Although the article does mention a small gasoline engine for extended range. This seems to contradict the "all electric" descriptions I've been hearing. Perhaps that changes the game, for the Volt?
But pending delivery of that technology, all-electric is NOT the next step. And you need to produce and sell what is the next step; prototypes aren't going to save the company.
I do think all-electric fits very well into a renewable energy, energy independent, environment-preserving future. But we're not there, yet.