I suspect the comprehensive Flash and Silverlight eulogies are a bit premature
You could hardly ask for a more ringing endorsement of the future of HTML5 and a Web based on open, common standards than Adobe and Microsoft's near-simultaneous leaks announcing the impending disconinuation [sic] of their respective rich media browser plug-ins, Flash and Silverlight.
As The Verge points out, Microsoft's announcement was not unexpected—in the past, Redmond has called HTML5 "the future." Adobe's announcement was much more unexpected. As recently as last summer, Adobe told me that Flash was here to stay and that their new development platform for HTML5, called Edge, was merely a supplement to their existing Flash toolchain.
But so much for all that.