I would be interested to learn the differences between the requirements of hydrogen for a combustion engine vs. a fuel cell.
My concern isn't the tank so much as the valve/fuel line being the weak link in a high-speed accident.
Even after the other obstacles have been overcome, it will take time for the gov't, insurance companies, and the public to be convinced they aren't riding a high-speed hydrogen bomb. (myself included- see "Louisiana forklift explosion")
I can see this for low-speed, industrial applications and I hope you are right and someone can overcome the issues the others haven't solved.