<p>How is Silverlight going to change the internet in the next 10 years?</p>

<p>Is this going to be a scene changer or just another blip?</p>

It will be another blip.  It's not seriously cross-platform, unlike Flash or any of its other competition, and no one seems particularly interested in it.  It might be neat and shiny but I haven't seen any real reason to move past playing around with it.
Put another way, it's a cool toy but not much else.