Consider the extrema: You have a Pentium P5 running at 16W doing something like 70 MIPS (which isn't quite producing 70 MFLOPS), getting something like 4 MFLOP/

Consider the extrema: You have a Pentium P5 running at 16W doing something like 70 MIPS (which isn't quite producing 70 MFLOPS), getting something like 4 MFLOP/Watt. Then take a Titan V at 14.9 TFLOPs (32 bit) at about 250W, for 59,000 MFLOP/Watt. There's almost no conceivable world in which it's worth running the P5. It literally consumes ten thousand times as much power per unit compute as a not-quite modern GPU. For compute to "always" be more valuable than the cost of the power it consumes, the value of that compute would have to be infinite. We have no such application. And I suspect we're unlikely to. :-)