They’re not talking about a literal hologram but about everything we experience as three dimensions in the middle of the universe actually being the way we perceive two dimensional effects that really occur only on the outer bubble of the expanding universe. Interesting theory that could also explain God’s place in and impact on the universe if one is inclined to look at things that way.
Yes, I thought it was rather obvious that the word “hologram” was simply a device to explain the concept, rather than it being a hologram in the way it is presented on TV. The concept of the Holographic Universe really isn’t the same as someone projecting a “hologram” as we have come to visualize it.
I see several on the thread “get it” and others don’t. But admittedly it is a concept that you have to really be interested in to fully grasp...and even then it takes a few thought experiments.