> But what use cases does a consumer or the average phone user have for digital representations of the physical space around them, particularly given that the user is already aware of the the physical space around them?

For the user? Probably not much at the moment, if ever.

For a company whose mission is to collect, aggregate, and extract monetary value from every last piece of data in the world?

For a government that's interested in extending its awareness?

Priceless.