But it doesn't mean they will. Think about it, when Fed is gone (or decines more), Nadal having problems with his knees, that leaves Murray to stop him year after year? Do you really think Murray can dominate Wimbledon? Win like 4 or 5 Wimbledons in a row? Murray may be slightly better than him on grass, but the difference isn't that big. At the end of the day, Novak is a Wimbledon champion and Murray isn't and that makes him a more successful grass court player than Murray, at least atm. Are you willing to bet on Murray that he'll beat Novak on grass 5 times in 5 matches? Murray's grass game (even tho very good) is overrated.
I expect Djokovic to lose to other players than Murray at Wimbledon when the Serb is 28. That's in only 2 years. Djokovic is not that young, almost 26. Federer, 7x Wimbledon winner, was already losing to the likes of Berdych and Tsonga at Wimbledon when the Swiss was 28-29... And this is Federer.