I found this Slovenian promotional website for Windows Vista, which is a full screen browser application done using Silverlight, from this post here.
Man it looks just an online version of Windows Vista, the awesome thing is that there is actually a 3D like animation done with Silverlight, as far as I know Silverlight only supports 2D animations, so this might just be a ”fake” 3D effect, but its neat indeed.
Though if you look closer, it does highlight some of the downsides of Silverlight, I won’t mention them now, but do check it out and tell me what you think 
