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We're still not even close for energy efficiency though. I can't remember the exact figures, but for most tasks the Brain is much more efficient per joule than any CPU.

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This is true for things people have evolved to do, but a cell phone can do a lifetimes worth of arithmetic in less than a second using negligible energy relative 2000 calories per day for 70 years

True, though I don’t think that’s a “DNA” computer in the same way that merely using semiconductors doesn’t makes my laptop a “quantum” computer.

Going with the Kuzweil estimate on Wikipedia, human brains are about 1e15 ops/Joule, whereas the best in the Green500 list (June 2019) is 1.76e10 ops/Joule.

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