Silverlight out of browser allows websites to build even closer, persistent relationships with customers. It enables the application to be placed in a restricted store on the user’s machine; and then provide a link directly to it from the user’s desktop or start menu. An application can now be easily found on the user’s desktop or start menu, and launched with a single click.
When you right-click the windows4all.com, you get the opportunity to launch it out of the browser:
Launching out of the browser supports actually installing desktop and start menu items as well:
Once out of the browser, the title bar is shown appended with the source of the .xap file
All programs are available in desktop version of windows4all except Internet Explorer.