"Metaverse" is mostly dead, anyway. It's basically turned into VR Bitcoin, and a worse version of the already existing VR.
A.I. seems to be the new shiny thing investors are moving into, and I'd be surprised if Facebook didn't just silently remove references to the metaverse eventually.
Fediverse, for the slightly cringey "verse" name, does seem to at least be trying something new. Federating multiple completely different sites like Mastodon, Kbin, or Lemmy isn't really something that was done before (that I can remember, feel free to correct if I'm wrong). You had some integrations with things like RSS and APIs before, but you couldn't just go on Twitter and post/reply/read a Reddit thread from within twitter, or you'd have to do it with a complicated network of bots.