I'm not so sure. To make an electric car work you need a battery. Mankind has been making batteries for over 200 years, so it's a "mature" technology, and it doesn't come remotely close to packing the energy that a tank of fuel can manage.
Furthermore, short of changing the battery, you can't load it up with more energy in a minute or two like you can with a fuel tank.
These two factors mean an electric car has an extremely limited appeal - namely as a second "shopping" car, or for those whose commute coincides with the car's range, whereby they'll need a proper car for all other journeys. They'll never actually be replacing a petrol / diseasel car and you have to remember that their environmental credentials relate only to the point of use of the vehicle. Something, somewhere's still emitting carbon to charge the batteries. None of these facts are likely to change massively in the near term. Leccy cars might be new, but the technologies within are very mature and changing slowly.
Like diesel cars, I think they'll be subject to a massive government u-turn in a few years, if they ever manage sufficient penetration to appear on the radar at all.