Technically you don't need a wire to charge a battery - there're some new products about to hit the market that does this (like a table that charges any applicance laid on it, so you could charge your cell phone). The same could be done to recharge the batteries on your electric car. So basically you could have a plate that's wired in the ground that you park your car over. Most wouldn't have the know-how to steal the power when you weren't looking.

If you've ever seen an analysis of power to efficiency, you'd see that real burning fuels are much more efficient than stored energy cells - you hit a point of diminishing returns with a vehicle when you transition to stored electric power vs real fuel power. I'm as big an advocate as anyone when it comes to alternative fuel and energy, but there's a practical limit - if all we were interested in is getting around for great economy, we could all be on vespas and luxuriate in 90 mpg+. The fact is we still need to carry children/pets, groceries, etc.

-- John