URLs are great, but they don't have to be limited to the web. Or, rather to say, the thing on the other end of the URL doesn't necessarily need to be something the browser handles directly.
I'd like to see something developed that lets you do something like:
x11://myapp.example.com
where clicking on that link in a browser launches the remote app and then renders the UI locally using X11 remoting - as opposed to trying to render the application UI in the browser.OK, I know, go ahead and say it.. X11 sucks, X11 remoting doesn't work on WAN links, etc. To which I say:
a. Fine, let's invent something better, that still avoid the need to pack every ounce of functionality in the universe, into a web browser.
and
b. That doesn't jibe with my experience anyway. Just earlier this week I was playing around and decided to launch a remote X app using X forwarding over ssh, over a public Internet link. Worked like a champ. In fact, it reminded me of how fucking awesome X11 remoting really is, and makes me long for either a resurgence of interest in it, OR (see a above) the invention of a newer, better version that everybody can be happy with.
There's also a lot to be said for delivering applications using Java Web Start as well. JWS is wicked cool technology that is tragically under-utilized. IMO, anyway. :-)