I don't know all the tech details. It's a given that any system that can pump that much power in a short time is not likely to be available on your average house circuitry, so this would be at "filling stations" of some kind.

This would still work. You want a fast charge on the road, but when you're parked at home for the night, a leisurely house-current overnight charge will work just fine.

I think the solution most people will like the best will be true hybrids, i.e. true electric cars with a little "charging engine" built in for long trips. The Chevy "Volt" is the first one of these I've seen so far that's close to production.

Make a mini-van that works like this, and is remotely affordable, and the American consumer will beat a path to your door.