Well I don't watch Netflix myself, but there seems to be considerable interests here I just want to share this with you. Netflix is going to dump Silverlight and move to HTML5.
The bad news is that
"Netflix will use HTML5 technologies incorporating some EME (Encrypted Media Extensions) for playback of secure data transmission.
Apparently the technology EME is not currently supported by Linux thus making it impossible to play Netflix content on Ubuntu or other Linux distributions. "