Alright, taking the claims at face value (always a bad idea) we have a way to fuel vehicles and we can make the fuel anywhere. That’s good. Potentially better in many ways compared to huge battery banks in vehicles.
But... there’s always a catch.
Hydrogen is still massively explosive.
So you trade the battery capacity/weight/discharge/charging issues for other issues. Namely deciding how much hydrogen you can safely carry at once to power a vehicles. Answer: not much or you have a really huge bomb.
So even if you can generate a parity on price with gasoline or diesel you’ll have to fuel up far more often.
Either that or we will just allow very large high capacity hydrogen cylinders on trucks and cars?!?
Propane is massively explosive too but people have learned how to handle it. Hydrogen is less dangerous than propane because escaped hydrogen floats into the atmosphere at 45 MPH, whereas propane sinks and collects, waiting for a spark.
An article in EV World details an experiment by a U of Miami professor who wanted to see the difference between a hydrogen car fire and a petrol car fire. Guess which one was more dangerous? Article here: evworld DOT com/article.cfm?storyid=482
H2 isn’t just for cars- you can cook with it, heat homes and fly drones for 4 hours instead of 20 minutes. Hydrogen is the next big thing.