Yeah no, unless you work on a project with 100 other people. Even if peer discovery, nat traversal and whatnot would be solved, what am I supposed to do if both my project members are currently offline? Synchronizing progress would be a nightmare in a three people project where everybody is located somewhere else. You could pretty much consider git peer to peer already, but everybody is too lazy to open their firewall and instead talks to the always-on supernode that is github.