The fediverse does have connections to larger social platforms, showing interest in connecting to the larger audience. Flipboard and Surf are great examples of ways to incorporate fediverse content into mainstream social timelines.
"We'll know that the fediverse wins...when mainstream media starts showing posts from users in the fediverse rather than X, Facebook, etc."
We've already seen some of this with Bluesky, but he's right, not sure I've seen a Fediverse handle out there yet.
If you have a fediverse account, you can quote this note from your own instance. Search https://mastodon.social/users/box464/statuses/116127656089965410 on your instance and quote it. (Note that quoting is not supported in Mastodon.)