[CraigS]

Bert;
My best efforts are on posts #10 and #11.

Seems to me its just a different way to envisage our universe (and thus explain our reality). It seems the term is formally "The Holographic Principle" as distinct from the term you use: 'Holographic Universe' (I'm not sure what this is).

IF we picture the observable universe as information bits on our Hubble or Particle Horizons, then we can explain some observations of the behaviour of Galaxies, matter, etc it/they approach this 'boundary' or 'horizon' (or holographic 'film').
The mathematics of Event Horizons (String Theory) around black holes can be used to describe this.

I'm not at the point of understanding of how it may be used to explain our 'reality'. Maybe that's not what the Holographic Principle is about at all (ie: perhaps the title of this thread is a misconception on my part .. I didn't understand any of it when I started the thread).

Happy to hear from others on this bit.

Cheers
PS: The bits radiate 'inwards' (via the Hawking Radiation descriptions/mechanisms). I think this explains the 'projector' bit (?)