This is very encouraging. I can envision a time in the not so distant future where the benefits of marketing your aircraft operations as very low emission (in comparison to contemporary jet fuel) will outweigh the financial burden of its early usage. It is nowhere near a direct replacement or a silver bullet solution but rather a possible alternative in selected applications and segments of aviation. But the hard truth is that aviation has a growing and glowing target on its back (as it should, the atmosphere cannot continue to be used as a dumping ground for carbon pollution, that crap has effects that are bad for all of us) and needs to adapt quickly to remain viable in the future.