And….once the line begins to blur we all know it will eventually go away all together.
Mozilla is getting into the act tool.
Also, search google for Silverlight + Desktop Application and you’ll get to the Silverlight overview. Silverlight Overview. An interesting section can be found at the end of the overview.
“Expression Design is a professional illustration and graphic design tool that lets you build compelling elements for both Web and desktop application user interfaces. Creating rich visual elements for Silverlight applications is made simple using Expression Design. XAML is automatically generated for elements that are supported on the Silverlight platform and all other visuals are automatically rasterized and included as bitmap objects.”
You can use Expression Blend and xaml to create desktop executables. The installing Expression Blend also installs several sample applications that run as exes. So soon if not already we should be able to create an app we can run as a web page and recompile to run as a executable.