This seems similar to the (now defunct) project Opera Unite[1]. Basically Opera turned each browser into a kind of server. Granted, Unite still used the Web, O

This seems similar to the (now defunct) project Opera Unite[1]. Basically Opera turned each browser into a kind of server. Granted, Unite still used the Web, Opera accounts, and ISPs, but I believe it could communicate locally over a router too. [1] https://www.youtube.com/watch?v=5oJd9lGWbWI https://www.youtube.com/watch?v=5oJd9lGWbWI