(continuation from the ethanol thread since this has nothing to do with ethanol)
the references I found to it were when I got into this arguement before and it's found that the only real economically feasible way to produce hydrogen to make these vehicles work is from NG
It is no question that making hydrogen from NG is cheaper right now, but that will not last forever. In the long run, crude and NG prices will continue to rise faster than the price of electricity, and it may not take very long to make other processes competitive, especially since hydrogen can be made in place, the only things needed are a bit of equipment (one time purchase) then water and elctricity to run it. The latter two is already available at virtually every gas stations.
No, that won't happen in a year or two, more like in a 5 - 15 years time frame.
If you look at what is available right now as a vehicle fuel, either in common use or in a lab, there is basically a very few of them: gasoline, (bio)diesel, gas (CNG, LNG, propane, etc.), coal/fuel oil, hydrogen, electricity (stored in some kind of battery) plus various alcohols, mainly ethanol, and to a lesser extent methanol and butanol.
Both crude and NG will be available for quite a while, but at a higher, or much higher price than today. That is mostly because of the limited supply. Coal or fuel oils are normally used on big vehicles or ships, so they don't apply here. Barring orders of magnitude of increase in crop yields and some other major breakthroughs, alcohols will never become a major fuel for a very simple reason that there is simply not enough land to grow the amount needed. The details of this can be found in the various ethanol threads. That leaves hydrogen and electricity.
Electricity, and then hydrogen can be generated without using any fossil fuel by harnessing the Sun's energy using either photovoltaic cells or wind driven generators, or by building nuclear or fusion power plants. (ATM fusion is confined to labs, but it can become a reality any time) In any case, with cheap and plentiful electriciy, generating hydrogen is a no-brainer.
Of course, there's a non-zero possibility that someone comes up with something new and radically different, like storing 'liquified electrons' in a bottle that could allow a car to travel 1000 miles on a pint of 99.9% pure electrons, or even better, using anti matter to generate energy, but I don't find that to be a likely scenario.