To me "holographic" in this respect is even more than 3-dimensional: it lets you hear the different layers of musicians. So you can hear exactly who's playing BEHIND another instrument and even further behind - AND above, too! For example I have a Guitar Duo-recording in which one guitarist is sitting on a high chair. And you can hear that his sound is coming from a higher position than the other guitarist who's on a normal chair. But that's what I basically expect of gear with the name "HighEnd". Everything else ist just Stereo imho.
