No worries, no reading required. If you are wondering why Microsoft came up with XAML (the eXtensible Markup Language) with the release of .NET framework 3.0 – which included Windows Presentation Foundation and Silverlight – then this sketch will help you understand that in 14 mins. This is my try to explain the rational behind XAML and designer/developer concerns using a sketch. Also, it has a glimpse of why prototyping is important and how SketchFlow (which is part of Expression Blend) addresses this important stage of system and UX design and development.
This is part of a session I delivered in TechEd MiddleEast 2010 which you can watch in full here: Prototyping the UX: Expression Blend + SketchFlow.