Potentially huge, with the proviso that they don't know if the tetrataenite they have made has the same properties as the tetrataenite that occurs naturally. You would think that would be easy to confirm but the article doesn't say if it has been done or not.

It's somewhat crazy that it was found by accident but it backs up a point I've made before about battery technology. With the entire spectrum of materials science to play with, it's very hard to know what will turn up.