In a nut shell, point source speakers are replicating what is on the recording, including, if the resolution of your speakers and electronics are up to it, all of the spatial information created by the environment in which the recording was made. It is this subtle spatial information that can create a holographic experience. And that is exactly why I feel that resolution is the key to obtaining holography. And I'm not talking about equipment with an uptilted FR which will appear, initially at least, to the inexperienced, as having a high degree of resolution.
Omni's, electrostats and panels, as well as dynamic speakers with rear firing drivers, are creating their own environmental sounds by bouncing signals off a bunch of surfaces, and all of these reverberant signals are laid over all of the reverberant signals on the recordings. So if you happen to have a recording which was made in a good acoustic and a simple mik'ing system was used, and it had the potential to creat a holographic image, you would never hear that potential realized with Omni's as its own reverberant field would obsure the subtle acoustic information in the recording.
You might ask "If the recording was a 'studio' recording, multi miked, and made in a dead acoustic, wouldn't it sound better with my Omni's? And I would respond "Yes, I believe it would". But you are just putting lipstick on a pig. Sorry, I couldn't resist using that very popular expression. :-)
In fact, probably the majority of recordings are made in studios with dead acoustics, multi-miked, dynamically compressed to be heard over boom boxes, and these are exactly the type of recordings will sound best over Omni's, etc.
You may love your Omni's but IMHO they can't do everything. And holographic imaging is one of the things they don't do. But, until you have actually heard really holographic imaging you won't appreciate the difference.
But then that is just my POV reflective of my personal experience. I'm sure many others will agree with your POV.
BTW, I had one of those Carver's when it first came out. Very interesting affect. The first thing I noticed playing an LP of a live performance with audience applause, was that it made you feel that you were sitting amoungst the customers who were clapping. Very interesting devise, that thin little box, but ultimately more distracting and unpredictible than sonically enhancing. Maybe I didn't have many suitible recordings, I don't really know. The holography demo I referred to, took place only a few years later, and that was both impressive and not distracting. Go figure.FWIW