Water is cheap, so converting X% of it to gas isn't the issue. The main issue is how much energy are you putting in to get how much hydrogen gas. That hydroge

Water is cheap, so converting X% of it to gas isn't the issue. The main issue is how much energy are you putting in to get how much hydrogen gas. That hydrogen gas can be used to power a fuel cell (for example) which generates electricity. Historically, the amount of electricity you get out of that conversion cycle (through the production of hydrogen gas) isn't great (don't have numbers in front of me). If they're improving that ratio, that is good news. If they're doing it with a cheap and durable catalyst, that's even better news.