Netflix leveraging HTML5 to offer playback in Linux

I was able to extract this tidbit from the O'Reilly Radar interview with Netflix cloud architect Adrian Cockcroft, How the cloud helps Netflix by Jenn Webb (emphasis mine):

Netflix doesn't ask customers to change much on their side (browsers, speeds, etc.) -- how do you achieve this level of inclusivity, and do you see it continuing?

Adrian Cockcroft: We have very wide ranging support for streaming devices and expect this to continue. We are working on the HTML5 video tag standards, which may eventually allow DRM-protected playback of movies on any browser with no plugin. We currently depend on Silverlight for Windows and Mac OS, and we don't have a supported DRM mechanism for playback on Linux browsers.