DRM doesn't belong in a standard like HTML5. On the freedom side, the argument hardly needs to be made around here; on the Netflix/DRM-users side, you don't really want to standardize on DRM because then you're locked to the standard if it doesn't work, and, frankly it solves no problems for you anyhow. DRM and Linux are not going to fit together no matter how many standards docs you write and how hard you thump on them. And when the standard fails to work for you because it has been hacked, you will leave the standard anyhow.
These are pretty words but I can't see anybody actually getting anywhere with this, not just because the standards bodies really shouldn't do this but because it doesn't seem to be in anybody's interest to create an HTML5 DRM standard.