Look up acoustic cameras on YouTube, there are some pretty impressive demonstrations of their capability. This is one of the companies I've been watching for a while, but it looks like FLIR and some other big names are getting into it: https://www.youtube.com/@gfaitechgmbh

The one use case that is both creepy and interesting to me is recording a public space and then after the fact 'zooming in' to conversations between individuals.

I am very interested in how small these arrays can be. From talking with a friend with cochlear implants, I would assume this could help dramatically with the right signal processing to help him hear.