My layman understanding of the Holographic Principle is an object falling into a blackhole has it's 3D information copied onto a 2D surface/perimeter (event horizon) and that 2D information can tell us everything about the energy that continues to exist within the 3D volume of the blackhole.
Fractal Mathematics suggests it is possible right? In other words we can infinity extend the perimeter of a shape while maintaining the same volume, but what are the proposed experiments, if any, to observe this phenomena in nature for quanta?
The Holographic Principle shares with String Theory the problem that it is a generic name for a huge number of theories, some that have been falsified already, some practically impossible to test, and some just out of reach.