In most features, my smartphone is about x1,000 more powerful than my ZX81 (from '81). RAM, "ROM", clockspeed. Accounting for no hardware fp (Z80), I estimated

In most features, my smartphone is about x1,000 more powerful than my ZX81 (from '81). RAM, "ROM", clockspeed. Accounting for no hardware fp (Z80), I estimated that my smartphone's GPU is about x1,000,000 the FLOPS. And high-end consumer video cards are about x1,000,000,000 ... which is about, or a little less, what one of the Moore's law corollaries predicts for 35 years, 1981 to 2016, per $.