> We’re also developing a new spatial app framework that helps mobile developers create mixed reality experiences. Developers will be able to use the tools they’re already familiar with to bring their mobile apps to Meta Horizon OS or to create entirely new mixed reality apps.

Like porting my whole android app + spatial features or...?

My guess is that they saw how nicely Apple made basic app development (read 2.5D planes with list views and spatial UX) and they are gonna try their best to shape their “app framework” in a similar fashion.