WPF (window presentation foundation) is the high level of user interface; provide the 2D, and 3D graphics environment. It’s fully loaded with multimedia feature, in single framework. There is no limit of your design in short, what you want to design in WPF it allows you. Developer can customize the buttons or create its own style button which is suitable to its application with high resolution. Create your own component and use in WPF.
For WPF FEATURE chick here: http://blogs.msdn.com/b/xtof/archive/2007/08/17/top-10-wpf-features.aspx