New Features for Silverlight 5. Microsoft has good practices on development best features package from Java and transformation them on .NET. The same situation is here, all Flash best feature already in the package and more. .NET is really powerfull platfrom with IDE like Visual Studio, with all Expression Blend and other tools for XAML and better communication with designers and developers team. That is really cool when competition like that begin and in 3-5 years one technology can grow and beat an old one, meaning like Flash.