Source: UseIT / Jakob Nielsen
quote: The reason you can only tab through the running apps from right to left is synonymous with pressing the "back" button on your web browser. Similarly, if you press and hold the "back" button in your browser you'll see a list of all the sites you visited and can pick one to revisit without having to tab through each of them.MS basic paradigm here is based around abstracting a web browser - which is probably the most universally familiar way of interacting with a computer for most people. Even granny can work a browser.
quote: I find your analogy perfect. However, you forgot to mention the best part : browsers have tabs, allowing fast switching between different web pages. If MS really did create the paradigm based on a web browser, it was thinking about a stone-age browser.