Thanks for the comment.
Just a quick reply regarding the Nissan Leaf and current state of EVs. The Leaf costs roughly 2x a comparable internal combustion car (it's most comparable to the Nissan Versa hatchback which starts at $14.7k. The Leaf starts at $21.3k, and that's after a $7,500 federal tax credit, so the real cost is $28.8k, or as a said, roughly double the cost of a Versa. Then there's performance. The Versa has 122 HP versus the Leaf's 107 HP. The Leaf is MUCH heavier than the Versa thanks to the battery. The better torque of the electric drivetrain probably compensates for this somewhat, but starting at a lower HP already, it likely accelerates more slowly than the comparable Versa. And then there's the real killer: range. The Leaf gets an average of a 75 mile range, according to Nissan. I think the max range is around 90 miles but if you're running AC or the heater in the summer/winter, that range is going to plummet to closer to 50 miles. The real upside of the Leaf of course is in fuel economy -- 130/102 city/highway miles per gallon-equivalent according to the EPA versus the Versa's 28/34.
So in upshot, you get a pretty decent car provided you drive mostly in the city and mostly less than 50-75 miles per trip. And you get it at twice the cost. If you ever drive more than 50-75 miles, then forget it.
For now, both range and cost significantly limit the market segments of customers willing to adopt something like a Leaf EV. That's largely why sales of the Leaf are modest, at 50,000 vehicles worldwide as of February 2013. In contrast, Americans bought 1.4 million light duty vehicles (cars, trucks, SUVs, etc) in 2012. So even assuming we sold all of those Leafs in the US rather than worldwide and assuming they were all sold in 2012 (the Leaf actually began sales at the end of 2010), total Leaf sales amount to 0.035% of new vehicle sales. (And as a share of on-road vehicles, it's even smaller).
As I mentioned in the post, thanks in large part to supportive public policies, the alternatives to oil are emerging. But they will require significant continued innovation and improvement before they present the same competition to oil as natural gas, nuclear, wind, and solar power now provide to coal.