When you speak something to people AVALON/WPF the first thing that comes out is GRAPHICS.
WPF is more than graphics or not only graphics. Its coverage of all common forms of presentation—UI, media, vector graphics, and documents—represents a degree of unification that is new to the Windows platform.
WPF enables software developers to achieve a new level of quality in the "User Experience" (UX) aspect of applications. Developers will be able to use WPF to build applications similar to those they construct atop Win32 today… but they will also use WPF to create and display media-rich interactive content, animations, and traditional documents.