Well, in the purely fictional hypothetical that an LLM could advance to the point of reliably replacing humans without a stark loss of quality and marginal cost-benefit before legislations step in to make the cost of increased power consumption and environmental damage reflect on what these companies pay in:
Their will be an owners class who have stake or claim over facilities and technology to utilize the AI, and then there will be an everybody else who have to fight tooth and nail politically for basic human rights as well as shelter and food. Just the current system but whether it’s that much worse or better depends on how well our democracies function.