I don't think even running a computer at full power all the time will make difference to the battery of a car. The engine of a car uses kilowatts and a PC watts. In other words a PC uses factor 1000 less than the rest of the car. Even if you could completely eliminate the power usage of the computer it will result in less than a mile extra range. So no "huge benefit" to be had. And where did you get the idea that this computer is always running even if the car is offline ? This computer is only for the entertainment system. As JB Straubel has said: "That's a key point. The whole entertainment system, those touchscreens, all of the applications you might load are totally separate from the propulsion of the car. In fact you could, if you had to, turn off the screens in the car while driving and the car still drives just fine."