Computerworld has the article Shock: Windows 8 optimized for desktop tablets. The title is a little misleading and may not immediately convey the import of what is in the article. The following quote may better show you why the artciel is worth reading:
More importantly, we know how Microsoft is going to manage the jarring transition from second-generation WIMP (windows, icons, menus and pointing devices) computing to third-generation MPG (multi-touch, physics and gestures ) computing.