If like me you've been playing around with the Windows 8 Release Preview and fell in love with the slightly touched up visual styles now present in desktop mode, then you'll probably enjoy this.
Below is a screenshot of the styles as applied to the same WPF application in multiple states. The top is obviously Aero themed, and the bottom set is with the newly applied styles.
You can download the full .xaml from here, save it into Themes/Generic.xaml and include it into your App.xaml like so:
4: <ResourceDictionary Source="/Themes/Generic.xaml"/>