This may be nightmare fuel, but I'll put it out there.
BBC – Scientists grow mini human brains to power computers
Power for AI: Easier Said Than Built
The energy and processing power needed for AI and for data centers is HUGE.
A nightmare notion I've had is if someone finds a way to use the human brain as a sort of CPU for a computer.
Rank upon rank of people strapped in, hooked up to IVs, catheters and plugged in to provide the processing capacity for a data center. They're (theoretically) paid for their time and (theoretically) provided with workplace safeguards. It may not be quite as effective as a conventional setup but it has some advantages. Smaller infrastructure footprint, smaller energy requirements, and likely harder to shut down. As for the warm bodies, there's no shortage. In a projected world of chronic un and under employment, meat computing is cheap.
As I said, nightmare fuel.