https://en.wikipedia.org/wiki/Wirth%27s_law

Not exactly the same (it's about power rather than price). But close enough that when you said it, I thought, "oh! there is something like that." There's also more fundamental economics laws at play for supply and demand of a resource / efficiencies at scale / etc. Given our ever increasing demand of compute compared increasing supply (cheaper more powerful compute), I expect the supply will bottleneck before the demand does.