There was an interesting email from Zuck released during one of their trials where he explained why they were focused on VR: it was basically all about Apple and wanting to own the next platform.
Makes sense although gaming is and will remain the most significant use case for VR in the foreseeable future
If I remember correctly; Zuck wanted to acquire Unity because he thought Unity would be the next big AR/VR platform, which Meta would hopefully control, instead of Apple and Google controlling the next big distribution platform. In retrospect, it would've been better that way because Unity's management will destroy Unity sooner or later.
Makes sense although gaming is and will remain the most significant use case for VR in the foreseeable future
The original email is from 2015, posted on HN in 2022: https://news.ycombinator.com/item?id=33538742#33540359