After sending the maps from your PC to your car, all the driver has to do is hit a button in the car to download the maps onto the car computer, making it available to read on screen. In addition to this, friends and family are also able to send maps to the car from their PC's rather than trying to describe directions over the phone. So which is safer, talking on the phone while driving or trying to read an electronic map displayed on screen while driving? At least you don't have to waste paper printing out directions every time you go somewhere new.
-via Crunch Gear