Hydrogen makes sense as a chemical feedstock for methanol and ammonia. It also scales well to grid energy storage, because you can add hundreds of GWhs at a time, and the technology is mature (Moss Bluff opened in 1983). You wouldn't use hydrogen in vehicles, because methanol is easy to make, and is a much better fuel for non-aero applications. Shipping is moving to methanol for that reason.
Hydrogen also makes sense as a reducing agent replacing coal for producing steel and other metals, where it makes possible the production of metals with less impurities.
