I am wondering about the monks that entered the stage before Todd Howard did the announcement yesterday night. I can't recall them saying anything. If they were indeed silent, and the picture of a mountain served as a background, could that mean that they depicted the ancient http://www.uesp.net/wiki/Lore:Greybeards from High Hrothgar?
I just uploaded a clearer version to http://www.youtube.com/watch?v=0wfcXThGZl4. And no, no beards, not chanting (that's from the intro music). If anything, I think they represent the moth priests.