Yeah the idea of the holographic universe is pretty cool in my opinion. And IMO it basically explains the existance of a seperate "mental" dimension. We cannot locate the exact points in our brains where specific memories are stored. Basically with holographic theory it explains that our "minds" really aren't here in the physical sense. They exist somewhere we cannot locate but we are connected to.

Its hard to wrap your mind around it and I know I don't explain it well, but once you wrap your mind around it you feel like you know everything?