I used this, well the idea that numbers often tend to be distributed evenly in exponential space, in my MEng thesis. The idea was that because so often in computers our additions or other arithmetic operations involve at least one small number then most of the switching activity in an adder should be concentrated in the lower order bits.

So the plan was to make the low order bits of the adder slower and more power efficient. Make the high order bits faster and less power efficient. Meet the same overall clock rate target given by the worst case but use less power in the average case.

Sadly memory operations, which look a lot like pure entropy, were sufficiently common that the gains just weren't worth the design effort.