What has Silverlight got on Flash

"Silverlight will now include a mini-CLR (Common Language Runtime) from .NET. What this means is that a subset of the full .NET platform that runs on desktops can be accessed from within the browser. As with the usual .NET runtime, with Silverlight you can code in a number of supported programming languages. At this time the languages supported are C#, Javascript (ECMA 3.0), VB, Python and Ruby. The Python and Ruby interpreters were built by Microsoft and have been released under their shared source license meaning that developers can get access to the code and are able to make contributions to it."