Hideo Kojima is more excited about interaction than hardware it seems. In a recent interview with IGN, Kojima states that he is more excited in the social and long ranged feature sets of the Playstation 4 saying:
I can say that with every new generation of hardware the capabilities of the hardware increases. But up to this point it’s always been very much of a vertical evolution – of course, you expect things like visual fidelity, audio, frame rate. New features such as 3D capability, etc, etc. These things are a given. They come with the new hardware.”