Silverlight is crap, it is part of Microsofts strategy to give an inferior user experience in Linux. Moonlight always lags a version behind Silverlight and does not support DRM, so I doubt it will ever work with Netflix.

Back in the days before Netflix used Silverlight I was able to watch movies using Virtualbox.. now with Silverlight the movies don't play well, for some reason it is much more resource hungry than their previous solution.