Eh, I wouldn't be so sure, chips with brain matter and or light are on its way and or quantum chips, one of those or even a combination will give AI a gigantic boost in performance. Finally replacing a lot more humans and whoever implements it first will rule the world.
You're not technically wrong, but that looks like tech that might be available decades from now. Even quantum computers might be decades away from practical applications, even though we've been trying to produce prototypes for decades now. Light based (optical) computers are in the same place or probably even further behind.
They'll probably all help in the future, but the current LLM craze doesn't seem to be helped by them at this moment in time, and an economic cycle like this has a boom phase of at most 10 years. So any changes in basic computing hardware will probably help with the next LLM++ tech.
You seem to have forgotten that the ruling class requires tax payers to fund their incomes. If we're all out of work, there's nobody to buy their products and keep them rich.
Not sure this equation works out. If demand for labor goes towards zero it really means there is no demand. In other words, when AI and robots fulfil every desire of their owners there really is no need for “tax payers”
If you really think 8 billion people are going to not tear the arms and legs off their overlords and their robot minions before that you're completely daft.