We started planning Windows 8 during the summer of 2009 (before Windows 7 shipped). From the start, our approach has been to reimagine Windows, and to be open to revisiting even the most basic elements of the user model, the platform and APIs, and the architectures we support. Our goal was a no compromise design.

This is an ambitious undertaking—it involves tools, APIs, languages, UI conventions, and even some of the most basic assumptions about a PC. For example, how do you isolate applications from each other, or prevent applications from stealing all your battery power? How can installing (and removing) apps be as quick and painless as changing the channel on the TV? How do you attract the broadest set of developers possible to a new platform? How do you build a touch-first interface with a unique point of view?

When we showed the first demos of Windows 8, we introduced our new Metro experience—fast and fluid, immersive, beautiful, and app-centric. We are certain that as we show you more in the coming months you will see just how deeply we have reimagined Windows. Metro style is much more than the visual design as we shall see.