I wonder if this "opening" of the operating system is their way of putting the metaverse project out to pasture - analogous to donating it to the Apache Foundation - without admitting that the company burned $36 billion on a misadventure.
I'm not keen on more headsets having a Meta data vacuum built-in, but this isn't the opposite of putting the metaverse stuff to pasture.
They're just shifting from an Apple strategy of full-control vertical integration to a Android/Windows strategy of platform ubiquity.