I agree, this is a cool result, but not something far out or extremely novel. It's discovering a new class of things that is different from other similar things we already knew about. One of those similar things we already knew about (CRISPER) turned out to be better than other tools we have for editing DNA in vivo, so that makes it potentially more exciting, but others haven't had the same application. It's interesting because the function is unknown, and you're right there's a lot of followup to figure out just exactly what is going on and why, much less to come up with an idea for how to use it to do something cool.

To me this strikes me as an incremental discovery that would have taken someone with time, interest, and expertise to make before. It could have cool applications or it could just be interesting biology. Molecular biology has progressed through many years and many rounds of automation and new tools, but the problems are still hard. This just strikes me as one more way we may be able to speed up one part of the process.