You should get a few good bites with that bait Marc.
They will never be as popular as internal combustion engine vehicles unless there are some serious advances in the technology involved, mainly in both the car and storage batteries at home that could be used to charge them overnight when the sun isn't shining. At the moment, they are too expensive, don't have the ideal capacity and have a low charge rate from the panels on overcast days.
There are people charging them with coal powered electricity and they think they are saving the earth.
There will also need to be a hell of a lot more fast chargers scattered around this vast land of ours. Quite often you have to queue for fuel which only takes a couple of minutes to fill the tank, imagine waiting 30 to 60 minutes for drivers to top up their batteries?
The only way I can see them being viable and sensible now is if you have a storage battery and panels that can power your car completely for ALL of the driving that you do, and even then, this will cost close to $100,00 for the equivalent of a $30,000 petrol powered car.
If people want to save the planet, have less offspring as population explosion is the root cause of all the planets problems.
Let the arguments begin !!!