Think of WPF as a managed API over DirectX, almost what DirectX can do, i guess 90% can be done in WPF. Then add on XML based markup call XAML. That is all about WPF. So it is more powerful that Flash in many way. The Flash-lookalike of WPF called WPF/E (where E stands for Everywhere) is not yet here and I had approach the WPF team on this ...