If it works in the virtual world, why can't the same principle work in the real world?
For example if you want to hide a private key, you need a virtual haystack to hide it inside, which is the entropy of it's random source.
So if we want to generate a 21.9 bit key we need to select one random one out of 4000000 possibilities.
The same way in the physical world if we have a 10 m^3 size room, but only 2m^3 area can be used to hide things, then if we were to hide a small object like a dice which is like 0.5 cm^2, then we have 4000000 possibilities, which would be 21.9 bits.
So could the real world hiding of object be quantified in the same way ( excluding the fact that our eyes have a wide vision range so it would be easier to find, but also we could not go through all possibilities as fast as a computer could)