Humans make abysmally bad batteries or power generators. That was always the dumbest part of The Matrix. The original idea for that was that we were the computers for the Matrix simulation instead, which made at least marginally more sense.

I don't see why you're linking artificial wombs with the matrix. In a matrix like scenario, I see no reason why the machines would even bother with artificial wombs, when the real ones already work right now (no R&D required) and are already pretty efficient.

We’d be better utilized as CPU and memory storage. Maybe generate brain structure, biology state with (re)generative biology like Michael Levin is up to at Tufts[0].

There’s tons of alternative research paths going untouched that leverage information theory to hack “reality” directly rather than hack on synthetic computers and software within an enclosed time-space vacuum constrained by known hardware limitations.

Metaverses running on synthetic machines seems way more prosaic than a metaverse in my own head I might be able to switch on off with a pill.

[0] https://youtu.be/XheAMrS8Q1c

Once the machines take over they'd probably prefer to work with yeast as their bio battery of choice. No need to spend compute on a simulation, the yeast would be happy as clams living in a big vat with all nutrient needs met.