The Web is, after all, just one of many applications that exist on the Internet, which uses the IP and TCP protocols to move packets around. This architecture — not the specific applications built on top of it — is the revolution. Today the content you see in your browser — largely HTML data delivered via the http protocol on port 80 — accounts for less than a quarter of the traffic on the Internet … and it’s shrinking. The applications that account for more of the Internet’s traffic include peer-to-peer file transfers, email, company VPNs, the machine-to-machine communications of APIs, Skype calls, World of Warcraft and other online games, Xbox Live, iTunes, voice-over-IP phones, iChat, and Netflix movie streaming. Many of the newer Net applications are closed, often proprietary, networks.
Article on Wired Magazine, August 2010.