The year is 2018 and you pull your sleek, all electric into your driveway to find the metal door lifting out of your path as if it "knows" you're approaching. Parking your car in the garage you get out and head inside, but not before a small, blue indicator light on your dashboard begins to glow. Your car is charging. And you haven't done much more than remove the key from the ignition and shut the door. The secret lies in a small box, not much larger than a set-top cable box or VCR.