Interesting idea. But the browser is the universal interface that lets us organize and deliver content. Anything replacing it would have to do that at the very least.... And what more?

This isn't about protocols or technologies like browsers to me a it is about the expressive. The browser is ubiquitous and still growing it's reach. Like protocolS and clients, the browser should eventually get long in the tooth.

But we are kind of evolving how we see things in the browser, be it html 5 or mobile.

0.02