Hello Jason,
Vassil blogged almost a month ago on the same topic:
http://blogs.telerik.com/vassilterziev/posts/11-09-22/silverlight-is-dead-f-dead.aspx
Even if we don't see Silverlight 6 the platform (Silverlight 4 and 5) will stay for a while.
All the best,
Vlad
the Telerik team
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