A system UI that uses as little screen space as possible by combining apps and standard web pages into a minimal tab strip: While existing operating systems have web tabs and native applications in two separate strips, Chromium OS combines these, giving you access to everything from one strip. The tab is the equivalent of a desktop application’s title bar; the frame containing the tabs is a simple mechanism for managing sets of those applications and pages.
I want to reserve judgment on Google Chrome OS until I try it out, but I have to say that between HTML5, CSS3, WebKit’s takeover of the Web, and now this, right now feels like a pretty cool time to be a web developer and/or designer.