I don't understand why fault-tolerant realtime stuff (like voice calls or life video stream) has ever been done via TCP in the first place. Sure, TCP-only clie

I don't understand why fault-tolerant realtime stuff (like voice calls or life video stream) has ever been done via TCP in the first place. Sure, TCP-only clients such as web browsers might have contributed to the problem. But on a technical point of view, those applications are exactly the use-cases UDP has been designed for. I guess the next step after web sockets (http://www.w3.org/TR/websockets/ http://www.w3.org/TR/websockets/) will be a UDP-variant of web sockets, enabling web clients to do what native clients have always been able to do: basic networking stuff via TCP and UDP. Alternatively, a UDP variant of HTTP might emerge.