GM Hy-Wire runs on water and air. Can your car do that?

Now this is cool. A prototype from GM that runs on sea-water and air. Yep, thats it. Inside there are no pedals but rather only controls on the steering wheel. The body is interchangeable with other bodies, so you can have a pickup truck one weekend, a sports car another, and a 5 seater sedan the next. It looks exactly like the cars of the future that boys (and some girls I suppose) drew in their notebooks in elementary school, except we probably didnt have the foresight to make it run on water and not pollute the environment. The video below is a review and a drive of the GM Hy-Wire prototype. The review starts about 20 seconds into the video. Click on the car to see the video: