Well battery tech will be a roadblock for some time but deadlines as far out as these make it look like something is being accomplished but provide enough time to not actually be a deadline. Converting off peak electrical power into hydrogen is getting more and more viable and frankly, I don't mind storing and transporting hydrogen versus stuffing the planet with li-ion batteries replete with their hazards.

GM should be first out of the gate with an affordable 200 mile range EV by late 16 or early 17. It will be interesting if other manufacturers follow quickly or wait too see what the uptake is. Fuel cells will likely be the filler application to directly replace fossil fuel engines.

that twenty year gap should be sufficient to get all used cars off the road as the one issue not addressed by current rebates is that the poor rarely can take advantage of them. Currently they seem to only serve the well off who could buy into new tech without them. California is already taking steps to fix this, income limits and such, but the federal government needs to do similar. Direct it to average consumer priced cars and likely there would be wider acceptance