Microsoft has revealed few features which are going to be included in .NET 4.0. Windows Server will host composite applications by extending the Application Server Role. Microsoft is concentrating on the integration between WCF and WF more seamless than today. Also, XAML (Extensible Application Markup Language) is going to play important role in the integration using it as a common model stack for applications which will help developers to build the entire application declaratively in XAML.
Detailed article on the same can be accessed at: http://www.sdtimes.com/link/32924