I can think of a few:
* Surveys (I had the county come in once in my sort-of legal rental appartment when they were legalising them, they needed to make a floor plan and fire safety recommendations)
* Real estate, which already uses 360 degree photo's and simplified 3d floor plan models
* Video games. Very generic usage.
* Virtualised museums, but those would likely need extra work to make all the placards etc readable
* Street View next level, also indoor navigation.
Oil companies have been using VR rooms for decades to explore, and understand, and map underground deposits and formations.
(I first saw it in 1999, when it was considered old hat. I can only imagine how much more advanced it's become.)
And how many of those does Meta have existing revenue and distribution model for?
Its pretty safe to assume that the primary driver of this is data hoovering for selling ads, everything else is just PR spin from the Meta thinktanks.