Not with a bang, but with a whimper

*Lastly, there has been massive growth in the breadth and diversity of
devices made by a wide variety of vendors providing both open and closed
systems.  *When we started Silverlight, the number of unique/different
Internet-connected devices in the world was relatively small, and our goal
was to provide the most consistent, richest experience across those
devices.  *But the world has changed.  As a result, getting a single runtime
implementation installed on every potential device is practically
impossible.  We think HTML will provide the broadest, cross-platform reach
across all these devices.*  At Microsoft, we’re committed to building the
world’s best implementation of HTML 5 for devices running Windows, and at
the PDC, we showed the great progress we’re making on this with IE 9.

http://team.silverlight.net/announcement/pdc-and-silverlight/

This really only makes it worse.  Because WP7 will probably be strong in the
enterprise, so we'll probably still end up having to use it.

Mike