I don't understand. Browser vendors have made it very clear they don't want to support Silverlight, so what browsers do you plan to run your apps on? Only older ones with security issues?
Silverlight was making great strides towards being a better ClickOnce and one of the most compact implementations of .NET (ironically they stumbled into something fast, small, and better for business than the projects specifically meant to produce a compact framework). If you need it for internal deployment to desktop, then I agree with you.
If you are talking about Internet deployment, the Internet doesn't want it... more importantly, Apple made sure to refuse plugins and eventually made everyone else go the same approach. It is what it is.