If it's anything like it sounds, Flock will take browsing to its obvious next step: a gateway to Web 2.0. It integrates with del.icio.us for online, shared bookmarking. It includes a built-in RSS reader, integrated into the Web browser in a way that other browsers don't yet have. It also has a button for creating a blog post using Wordpress, Six Apart, and Blogger, among others, and it's got drag-and-drop support for uploading images to Flickr.
Flock is, for now, a developer's preview; I'll be downloading it today and hope to have a fuller preview soon. In the meantime, though, just reading that list of features has me thinking about how obvious it is that browsers, right now, just flat-out don't do enough to bring the power of the Web to this limited little window we're using. In fact, I feel kind of furious that I got sucked into ever squabbling over whether Opera was better than Firefox was better than IE was better than who-knows-what-else instead of banging my Web-surfing fork on the table and demanding a heck of a lot more than any of them were giving me in the first place!