It would be great but it seems very unlikely to me. Hydrogen is difficult to store; it's corrosive and leaks out of the tiniest holes. (Like, the ones between molecules.) It requires high pressure to get a reasonable quantity, exacerbating those problems, and very dangerous if pierced.

It just doesn't seem reasonable. If we actually had a lot of hydrogen gas around, it would be far easier to distribute and use in the form of hydrocarbons, which would allow us to use existing technology rather than invent new ones.

I'd love to be wrong about this, and clearly there are scientists in the domain who disagree. But it just doesn't seem reasonable, and it has a whiff of being used as a deliberate distraction to slow investment in renewables that can be deployed right this instant.