The Ziff Davis folks have a story showing some of the enhancements in the latest build of Vista, Microsoft’s next version of Windows.
While I’m sure all of the new security and stability features are the real reason you should think about upgrading when this becomes a production release of Windows (MS says late 2006), I think this new volume control, which allows you to adjust the volume of sound from different applications independently, is a terrific enhancement to Windows:
