First, where will the power come from?
Second, consider this:
1959 Henney Kilowatt
Range: 40 miles
Price: 3,600 (or $26,201.06 in 2009 dollars.)
2011 Chevy Volt
Range: 40 miles
Price: $41,000
The Volt’s speed is higher, but basically we haven’t moved forward much in 50 years, and the thing costs 160% what its predecessor does. Compare that to a bottom basement Mustang...$2,368 in ‘65, $22,125 in 2011...and straight inflation would have the car costing $16,204.73. Not only is that closer, but I think it’s fair to say that a 2011 Mustang performs better on less fuel.
Based on the performance of other technologies, an electric car should do much better than its predecessors and give you more capability per dollar, but we’re moving in the opposite direction.
And please don't take my comments to mean that the Chevy Volt is a great car or the answer to anything. I never said it was, but only that there will be improvements over time.