This interesting theoretical tangent raises a good question about the way we measure information. A laptop only computes being-a-laptop. What makes it useful i

This interesting theoretical tangent raises a good question about the way we measure information. A laptop only computes being-a-laptop. What makes it useful is that we have assigned meaning to the physical output. That is, there is a homomorphism mapping the atoms on a computer to a logical program. So any physical system is only computationally useful to the extent that we can define homomorphisms from its physical state to a logical system of interest. The OP is about the physical limitations of the information stored in the underlying system as measured by entropy. I wonder if entropy is the operating definition here because it implicitly defines what logical system we use to identify the physical system.