I don't want to piss on your bonfire, and I agree that electric cars are the way of the future, they're just not a practical replacement for a gasoline gar yet.
In a car that small, you're never going to be able to fit in the massive battery packs that other electric cars use. And the cutting edge of today's electric cars need a massive recharge (eight hours?! I'd rather get a tank of petrol at European prices!) every 90 miles or less.
In other words, the chances are that when you need the cutesy little thing, it'll be in front of your house with four hours or so before you can go anywhere, or risk the battery running out in the middle of the road!
So let's hope they figure out a quantum improvement on today's batteries between now and 2012/3.