In most features, my smartphone is about x1,000 more powerful than my ZX81 (from &#x27;81). RAM, &quot;ROM&quot;, clockspeed. Accounting for no hardware fp (Z80), I estimated that my smartphone&#x27;s GPU is about x1,000,000 the FLOPS.<p>And high-end consumer video cards are about x1,000,000,000 ... which is about, or a little less, what one of the Moore&#x27;s law corollaries predicts for 35 years, 1981 to 2016, per $.