Re: "GM is projecting an all-electric future..."
>The cracker, however, is tax. As you cannot tell wall power from fast charger power I suspect you'll be facing road pricing.
Well, there is metadata...
My newly installed charging point is intelligent, only cars I have registered to it can use it and the charging point will only offer electricity to the car according to the schedule and rules I have specified.
With smart meters (I suspect integration with car charging points isn't possible with current generation of UK smart meters :) ), it is relatively simple to have different tariffs...
As for road pricing, well I expect overall we will be paying more (in taxes/duties) to the government and its contracted agencies than we are today.