Federer is aging, and Novak is in his prime. As time goes on, it will be in Novak's favor! Plus, next year, Federer will likely be in Nadal's half, so I expect him to lose to Nadal in the SF if they do meet.
Of course, Nadal will again lose to Djokovic in the final!
So, my predictions, as I stated many times before, is that Novak will be the new Federer and he will be even more dominant! I expect him to win Calendar Grand Slam next year. Had he not lost to Federer in this year's FO, he will already become the first man to win all 4 grand slams in the calendar year since Rod Laver did it in 1969!