The confusion here is probably comming from the fact that PHB is a security guy and he is using the term root to refer to root of trust which is not the same thing as DNS root. I would also suspect that he is talking about a situation where each participant choses their own root of trust to rely on. I would also predict that when he does come out with something it will consist of a rather short proposal that effectively turns the whole system on its ear. Well thats vision so good its scary for you.