"As absurd now as walking around on the moon was in the 1st Century."

Yes true(wonder why we don't shuttle down to the moon since we landed half a century ago and still never went back???), it is going to be absurd till we have an AI which is as capable(or even half as capable) as much as a human and we can debug that AI or maybe that AI debug's itself reflexively. Till then, I would say its absurd anytime to think that an AI could take control of a human and guide the human in its actions. Till then, I will keep my brain intact and keep away from any AI implants or any kind of implant altogether).