Can Cars be powered by urine

Today i read am article that describes that scientists from Ohio University found a way to produce hydrogen energy from urine.
According to Discovery News, the scientists used a nickel-based electrode to make cheap hydrogen from urine.
When the research team led by professor Gerardine Botte stuck the electrode into a pool of urine, and applied an electrical current, hydrogen gas was released, which was used in fuel cells.
The prototype is about three inches by three inches, and is capable of generating 500 milliwatts of power.
Scientists hope to create the commercial versions of the technology.

How good it will be that we are carrying our own fuel? lets see if it happens in future may be there and much more to explore, as this is just a small step.
So don't waste your urine better save it may be it will cost in future(just kidding) or really it may happen.