AI could potentially stimulate prefrontal cortex activity non-invasively via ultrasound waves through an earpiece.

“And I could imagine at some point that the AI will cross a precipice where if it has inline wiring to actually control neural activity in specific brain areas, and I don't mean very precisely, even just stimulating a little more prefrontal cortical activity, for instance, through the earpiece, a little ultrasound wave now can stimulate prefrontal cortex in a non invasive way that's being used clinically and experimentally, that the AI could decide that I need to be a little bit more context aware.”