The Nature of Time

In your book you mentioned about the problem of time, and I know that you talked to or are familiar with Julian Barber's work too. Do you think that time might turn out to play a fundamental role in physics? Because it appears that so far when you look into the theories, quite a few more physicists are becoming convinced that time is pretty much going to turn out to be an emergent concept. But this is something that we haven't worked out yet,. because at the moment the kind of statements we've been proving are at the same level as what you do in quantum theory computation.