[mmahemoff]

The web is still open by default and can always be made more closed by deliberate action, just like Flash is closed by default and can always be made more open by deliberate action.

People have implemented crypto algorithms in JS for over a decade which would enable this kind of thing if you really wanted to. DRM is just formalising it and again is not the default for video or audio.

(BTW I already posted BBC's position on this last week - no response http://news.ycombinator.com/item?id=5200917)