'Object from the future: Fuel Cell

New - what is new about this object, what makes it different?
Replace - what other objects does this object replace?
Change - how could this object change its environment (remember the car example)?
Growth - Are there many of these objects around, what are the growth statistics for these objects?
Other - any other issues that you feel to be relevant
References - where can the reader find more information on this object, and what other information support your claims that this is something new?

Sander van den Belt