URLs are supposed to represent resources. A web app can be a resource, and there are techniques for managing state within those. Hashbangs might be one of these. But when large web properties are converting all their links to _articles_ and other _bits of text_ (tweets/twits/whatever) into these monstrosities, it’s not innovation. It’s a huge mistake that ought to be regretted now and will certainly be regretted in the future.