I remember seeing something on TV about each home having a hydrogen generator that would provide power for the home and vehicles.
Plug Power , some nice folks in enchanting Latham, NY. A decade ago they were predicting imminent availability of a hydrogen fuel cell about the size of a Maytag washer, capable of powering a home. As others have commented, you gotta supply a whole bunch of hydrogen, which didn't work out too good for the Hindenberg.