If you build a practical invention, people will buy it. The support facilities will be built as it becomes popular. If you build a car that costs twice as much to buy, twice as much to operate and only runs 50 miles between refills, very few people will buy it and no support facilities will be built. I'm not impressed at hydrogen at all. The biggest hold backs to alternative fuel cars is lack of range and primary energy sources.
Range is largely a function of joules stored per kilo of storage device.
Batteries and gaseous hydrogen don't store nearly as much energy per kilo as gasoline. Liquid hydrogen is probably comparable to gasoline but it costs a huge amount of energy to reduce hydrogen to a liquid state. Most alternative power sources are not primary sources. If you want to make hydrogen or charge a battery or pressurize an air tank, you have to get the energy from some other process. In many instances, this only ends up moving the pollution source, not eliminating the pollution.