I think you saw this when either reading an article on the

entropy of black holes and the

information loss problem, or talking about the

Holographic Principle which from what I know, is purely speculative.

The Entropy of black holes is calculated using the area of the event horizons surface, where you would of thought it would be volume of the sphere. Im not going to pretend i know why this is, ill leave that to someone else.

The holographic principal leads on from this, and from what i can tell is mostly speculation and forms part of string theory. Basically it means information about any volume can be obtained from its boundry. I assume this must involve more than 3 spatial dimensions, but im not sure.

You are looking at it from the more speculative angle. So far I have only seen it used for objects like blackholes, which is necessary to try to explain the loss of entropy when it absorbs matter. The Area is used in the maths for hawking radiation.

I can only point you in the right direction, sorry for all the links to wikipedia, but they are generally a good place to start, and the references point to good sources to read. I myself dont know an awful lot about it, but i might take this opportunity to read up on it.