There is a lot of comments in different blogs. Click this link to go to the blogpost by Mary-Jo Foley in ZNet that stated the fact in her interview with MS Bob Muglia:
Shawn Wildermuth are just sitting and looking at the explotion in twitter.
NerdPlusArt says he loves HTML5 and also loves Silverlight, and continues:
So here’s the thing: HTML5 is an undeniable part of the future and it would be foolish for Microsoft to ignore it. It’s the 5 bazillion pound Elephant in the room (note: my spell checker didn’t complain about bazillion. cool!). HTML has always been the lingua franca for browser apps and it’s just gotten much much better. You can’t look the other way when that happens. Microsoft can’t and developers shouldn’t, especially if you want to build browser-based experiences and apps.
So the Silverlight adventure is over. Scott Guthrie will not be allowed to deliver a new version every 8 months. But instead we will get HTML5 tools inside Visual Studio.
And, the winner of the battle is Apple. With 90% increase in iPhone delivered, the world moves to Apple’s decisions.