@fanbaby: for every video/presentation like the one you link to there are xaml/c# ones ... How can you not think XAML is not taken seriously by MS and most importantly WINDOWS when some very key applications are written in it.. AND the fact that it's made it into WinRT also means its being viewed as a serious technology..

I wish we would just move on from these stupid side line comments ...

I use XAML, I use WinJS, I use DirectX/Cx (very early dev thou), and I use pure Web technologies (html/css/js)  ... they are all good and have there pro's and cons and NO one technology is the magic bullet!

...  move on!