The Japanese have developed a car that runs on nothing more than water, if they can make it work (also commercially) than this really is a breakthrough.
Realizing that there's a sucker born every minute is no breakthrough.
How the heck can you get energy from breaking down water into hydrogen and oxygen, and then burning them to form water again? Forget all the silly "membrane electrode assembly" hocus-pocus. This is a perpetual motion machine of the first kind, and therefore a scam. The details are irrelevant.
