Socially, its not too different. A good netizen will have to manage the servers, just as usenet required good administrators to thrive in the 90s and early 2000s.
Technologically, PeerTube / ActivityPub is built on top of modern protocols which are more fashionable right now. WebRTC, ActivityPub, etc. etc. are all web browser technologies that can be implemented in PHP and Javascript alone.
