It takes a lot of energy to make this though, so you could almost think of the fuel as a battery. If they do go with an all solar panel, or wind turbine way of harnessing that in the first place, then it'll make sense. I have a feeling that it's going to be a very expensive product though. Maybe long term it'll be a great solution though.
Oh, and I'd LOVE to have a truck that was quick but didn't smoke at all!