Silverlight was just the name of the browser plugin, which could use Xaml/C#, or Xaml/JS, etc.

Now you have Xaml in Windows Phone x apps and Windows 8 Store apps. And Xaml is a lot easier to use than HTML5 for these types of applications. "Silverlight" plugin might be dead, but Xaml is growing, with the inclusion of new controls for WP8 like ViewportControl among others.