That will be the main contest--internal combustion versus fuel cell electricity. Which will win? Which is cheaper and more convenient/low maintenance?
Like any new technology the initial development, research is costly....but in the long run, since the hydrogen may be obtained from natural gas, methanol or petroleum. It will be likely.....natural gas and methanol (even garbage) that is "going to waste" now will have value and will not have to be pumped or shipped from the other side of the world....
The cost will be in the process, not in the transportation, or raw product. That process will decrease in cost in time....