I'm not certain about the direction of Meta, but for now it seems that their most important areas are entertainment (Instagram, Reels) and messaging (WhatsApp, Messenger), not social networking (Facebook), which is dying.
For entertainment and messaging, generative AI is going to be huge. In entertainment, content creation and discovery will be severely advanced by AI. For messaging, at the very least, users will expect AI support in message composition and company-customer communication.
I'm not sure if lonely people would rather talk to an Alzheimers anime girl or be alone.
I have lots of friends online. I don't need 3D VR interactions with them.
But in that sense they're not far behind the pack as it is.