Every example you have listed above is a company ( or company like) ... or maybe more apropriately a "thing" .. Bitcoin is more of a protocol, and in my view, protocols are much more resiliant with "first mover advantage" .. think more like: TCP/IP, HTTP, FTP, SMTP ... While all of these have somewhat evolved over the years, the current incarnations are still very much like the originals, and built up from the originals.
If BTC hasn't already hit critical mass with the first mover advantage, it isn't far off. And with a protocol, once critical mass has hit, it is nearly impossible to replace it with a new (even if better) non-compatable protocol.
Sigg
Your right bitcoin is a lot like a protocol. The Internet suite protocols examples you gave are all things that grew out of the formation of the internet by DARPA, IAB, IETF, W3C etc. Bitcoin is a disruptive entrant that is more similar file sharing protocols than it is to the governmental and academic bodies that created those protocols.
File/music sharing protocols and the entities behind them have evolved considerably.
Napster
Gnutella, eDonkey2000, Freenet
Kazaa
Limewire
Bittorrent
I think digital currency will evolve just as everything else has.
Bitcoin = 1.0 Something else will be 2.0