I guess I don't understand the significant advantage this would provide. You can accomplish some of the same functionality with other control flow libraries. Also, I could see the future declaration, with potentially cascading effects, causing as much confusion in the code as callbacks.
The idea of continuations (which promises are) is to make an asynchronous control flow look like it is synchronous, but not become synchronous. More than anything, it is about readability and having a logical flow in the code.
The point of Node is that it is asynchronous.