Daniel Carter probably has another World Cup left in him after this (he probably won't be at his best). I'd agree with ranger that Beuden Barrett is going to be a class player. I can't see Cruden becoming world class in the next few years, while I think Anscombe has all the skills to be the best but he really underperformed in the last JWC (despite him getting best player) as he didn't run the backline as well as previous players like Cruden and Bleyendaal.
Quade Cooper is a very different player to Daniel Carter. Cooper can look amazing and then average within two weeks apart and his defense has never looked good. Daniel Carter always plays well. It's a bit similar to me as the argument of Carlos Spencer v Andrew Mehrtens. Mehrtens had the best kicking game in the world, was an underrated runner and would take contol of games. Spencer on the other hand pulled out little bits of tricky magic that no other player could/was dumb enough to try, and it paid off, but he was never consistant.