2K announced their new NBA 2K14 Eco-Motion engine, along with a video that demonstrates the power of that engine.
Eco-Motion allows the in-game athletes to adjust their movements based on the environment around them, instead of using pre-canned animations that must play out exactly as they were mo-capped. Jumpshots will change midair, dribble moves will alter in between dribbles and players will land in a unique way following every thunderous dunk or block.
In other words, no two animations in NBA 2K14 should theoretically appear exactly the same. See the video below for more details on exactly how Eco-Motion works.