“Oh, look, he’s dead. Let’s sell his neurons.” The neuron harvester says as he wipes the blood from his knife.

>In the future, when humans die, their neurons will be sold and repurposed in local AI's.

In the future, humans won't need to die to have their neurons sold off as hardware for the AI.

Incidentally, that's the original idea behind the movie Matrix: humans are used as CPUs for the Matrix. The word is, the idea was too advanced for the audience and was dumbed down into "humans are batteries".

I guess we'll have to treat Morpheus as unreliable narrator, or assume that the real energy in the future is compute, and suddenly the movie makes 100x more sense.