Sounds like Jeff Duntmann's "jiminy", which he wrote about in PC Techniques magazine back in 1992. A matchbox-sized general purpose computer and life log, infrared connections to peripherals as needed, with a mesh network to other jiminies and the internet-at-large. Jeff didn't use the term "AI", but that would describe how it worked.
> A matchbox-sized general purpose computer and life log, infrared connections to peripherals as needed, with a mesh network to other jiminies and the internet-at-large. Jeff didn't use the term "AI", but that would.
Notwithstanding that most of the mobile OS’s are locked down more than some would prefer for a “general purpose computer” (but less than is likely for a porta-Grok), and that most devices are bigger than a matchbook to support UI that wouldn't be available in that form factor (though devices are available in matchbook size with more limited UI), and that it mostly uses RF like Bluetooth instead of IR for peripherals because IR works poorly in most circumstances, isn’t that what a smartphone is?
Really interesting link to "Jiminy", I hadn’t heard of that before. Also didn’t know Musk was planning something similar, but I think it’s more of a phone than a wearable?
http://www.duntemann.com/End14.htm
Elon Musk's portable-Grok-thing is a long step toward the jiminy idea.