This is what you can expect in Visual Studio 2008(Orcas) related to WPF!
• Performance
– Overall, moderate improvements on CPU consumption & working set.
– Increased animation smoothness
– Layered Windows perf improvements for both XP & Vista.
– More performant Xml databinding
• IME support fixes
• Firefox Plugin Support for XBAP’s
• File Extensions for Click-Once Applications
• Session & Resource Cookie Support in XBAP’s
• Framework Element 3D
• AddInControl supporting CLR’s addin model
• Support for IDataErrorInfo
• RichTextBox Extensibility
• Increased databinding debug spew
• Support for page transition effects