On paper, if everything stays the same, with their age and the ability to piece parts around them to make a good team, they could go on quite a tear.
However, it's evident now that all of the big time free agents are looking to do the same thing. The Knicks had Amare, and Carmelo basically chose to play with him. They've got other issues too, but I won't be surprised if Chris Paul decides to join that party in the near future, or maybe he'll join Kobe in LA. I also won't be surprised if Dwight Howard decides to join Derek Rose in Chicago, or at least some other big name free agents will join up with Rose.
It's going to be the new way to create a champion in the NBA. Have a big market team. Pick up one star. Wait until some others from smaller markets are free agents, and they'll jump on the ship too.
I'm going to be curious to see what Kevin Durant does and Russell Westbrook, but more importantly Durant. Will they stay in OKC when they become free agents? Will one or both decide to stay? More than likely they'll look for the big market, and Durant especially will be able to name his price and location.