Michael - in my opinion, no. The goal is reducing carbon emissions, so if the total lifecycle emissions aren't significantly less than what would be produced by other fuels, we're going backwards.

Possibly of more significance is the inability to source hydrogen. If it's far cheaper and more productive to make it by steam-reforming methane, the incentive for any "green" methane producer is to simply manufacture or buy "gray" hydrogen in bulk and sell it as "green" (both are colorless).

Not that anyone in the oil industry would lie, of course.