Lots of .Net people, the kind that comment on Channel 9 posts at least, are upset about this HTML5/JS turn of events. Ex-Silverlight PM Scott Barnes (aka @MossyBlog) had this to say to them:
From https://channel9.msdn.com/posts/A-quick-look-at-Windows-8#c634425768270000000:
The sun..will come out tomorrow...you