previous 'computing saturation is at 100% or close' pronouncements go back to 01953 https://geekhistory.com/content/urban-legend-i-think-there-w...

this human body weighs about 100 kg and occupies about 100 liters. it contains about 30 trillion cells, each of which contains something like 10 million ribosomes, 300 quintillion in all, which are programmable machines that construct proteins by executing a digital program on a dna tape, although the program is quite limited, more like a player piano roll than a computer program

current sram bits are on the order of 20 nanometers in diameter, about the same size as a ribosome. this is clearly feasible because these devices are already in mass production. you need on the order of 4096 of these, plus a roughly equivalent number of transistor-like switching elements (which are smaller), to get something we would recognize as a computer (i.e., you can program it in c or basic or assembly rather than verilog or abel or something). multiplying by a safety factor of two, we're talking about 32768 20-nanometer-sized elements, which is a cube 640 nanometers on a side

obviously (?) such a computer can't be manufactured by current manufacturing techniques, but also obviously it will work once you figure out how to make it. quite likely you can improve on that by orders of magnitude; ribosomes, after all, are considerably more capable than a 1-bit memory cell

you can fit 400 quadrillion such computers into the space of the human body, a bit over ten thousand per cell

so quite plausibly we are still 20 orders of magnitude away from personal computing saturation, and after another 12 orders of magnitude people will be saying things like 'then a few in every home, later one in every hand, and finally one in every cell. now it's at 100% or close'

even this is overly pessimistic, though. the obviously-workable computer outlined above weighs about 2e-16 kg, and jupiter weighs about 2e27 kg, so if you convert jupiter into computronium, you can get about 1e43 computers, roughly 1e33 computers per currently living person. and the milky way is about 1e12 solar masses, which works out to 2e42 kg, so a milky way of computronium would be roughly 1e58 computers

converting most of the milky way to computronium is less obviously feasible or desirable than putting anticancer robots in every cell but it suggests that we're closer to 48 orders of magnitude from computing saturation

as for corporatism, corporatism seems very unlikely to become established in the current political environment outside of backwaters like argentina. of course, the future is enormously unpredictable, but to me corporatism seems like an idiosyncratic response to the political conditions of the 01920s