So, this is slightly off topic, but out of curiousity, what are NPUs good for right this very second? What software uses them? What would this NPU be able to run if it was in fact accessible?

This is an honest, neutral question, and it's specifically about what can concretely be done with them right now. Their theoretical use is clear to me. I'm explicitly asking only about their practical use, in the present time.

(One of the reasons I am asking is I am wondering if this is a classic case of the hardware running too far ahead of the actual needs and the result is hardware that badly mismatches the actual needs, e.g., an "NPU" that blazingly accelerates a 100 million parameter model because that was "large" when someone wrote the specs down, but is uselessly small in practice. Sometimes this sort of thing happens. However I'm still honestly interested just in what can be done with them right now.)