you do know that prior to this year Novak had zero injury problems right?Anyway I doubt Novak will play past 2014
Look how massively Federer declined in 2008 when he was 27.
Nadal's and Djokovic's decline at 27 will be way more drastic than Federer's to the point they won't be winning slams at 27 or older.
26 is probably the age when Nadal and Djokovic will be winning their last slam.
As for the thread(I voted yes) if Federer wins the AO he could very likely win another slam
Thing is I'm not so sure Federer will win the AO. Djokovic is too good there atm.