This sounds like it’s worth the hype to me. It has about the same energy density as lithium-ion, and it uses non-toxic and abundantly available materials (unlike lithium-ion).
The cycle count is a little poor but it’s in the ballpark of lithium-ion, is likely to get better, and is much less of an issue if the batteries are non-toxic.
Also… the fact it’s non toxic could effectively reduce the weight especially for small batteries (where they’re still not safe enough despite heavy enclosures - kids literally die after swallowing coin cell lithium batteries).