To me this seems more potent than a typical paid PR piece.

This seems like the last person to invest just realized they are holding the bag and if they believe hard enough they can pass it on.

I think the distinction of what is a PR piece and what is not has kind of blurred dramatically recently, dont you?

It's an interesting concept to beam power via ultrasound, but it sure sounds optimistic at any realistic distance, or to make it as prevalent as wifi.

Maybe there's a killer use case only the initiated (VCs and management) know of of? Otherwise it seems like a long shot for 10M.

It's written by an investor, right? If so, yes it's marketing.