I. Want. One.
The main difference between the Volt and today’s hybrids (e.g. Prius) is that the electric motor always turns the wheels. When the battery is run down (after ~40 miles), the gasoline engine is used not as a means of propulsion, but as a generator to run the electric motor and charge the battery on-the-fly. This way, the motor can run smoothly and efficiently, without having to rev up and down in stop-and-go traffic. You also get a nice performance boost, as electric motors tend to perform better from a dead stop than internal combustion engines.
When the battery technology advances to the point where it’s a bit more affordable (the Volt will originally start at $40k) this will be a complete game-changer.