09-18-08: RebbiThis is how I view the concept of audio holography as well. It's the projection of the image into the room that creates the 3D effect.
... to me, soundstage and imaging are what happen between and sometimes to the right and left of right and left speakers...whereas "holographic" refers to the sense that sounds and instruments are "out in the room" closer to you than the plane of the speakers.
I've heard this only with tube amps and cone speakers in my system.