I'm just waiting for a lightweight pair of AR glasses that I can wear while wrenching on a hobby car that give overlays, labels, disassembly instructions akin to car mechanic simulator.
If they can automagically tell me what size wrench/socket i need to grab, even better.
As hard as it is to find any service manual at all for old machinery, and then when you spend $100 to order a used manual off ebay find that the really useful pages are ripped out or covered with grease, I think a product like you describe is waiting on AGI more than it's waiting on nice AR glasses. Very few people need this product, so the intellectual labor to produce it will need to be nearly free.
I've gotten to where I can identify most bolt head sizes on sight... I very rarely have to pick up more than two wrenches and usually the first one is right. Also I find that bolt sizes are typically fairly standardized on a particular machine. I occasionally work on a mini-excavator that has 10mm, 13mm, and 19mm bolts (and 8mm allen-heads), but nothing else I've found so far.
Well I haven't worked on anything with JIS! A guy I used to work with hadn't had fractions in school, so he would use the metric even on SAE parts. He couldn't figure out that e.g. 7/16" is smaller than 1/2".
Leave it to the advertising-surveillance industrial complex to explore every possible route to inject outrage into subjects' brains (whether they want want it or not).
As a person who wears glasses, I'm very excited for AR devices. A great input device* and incremental improvements in the battery tech and energy efficiency would make them ideal for on-the-go computing, reading, and note taking.
* https://wefunder.com/tapwithus looks promising, and facebook bought up companies doing similar things. A ring with a touch slider, gyroscope, and a button would be interesting.
I e purchased and learned how to use a tap strap. Unfortunately it doesn't really live up the the hype and after a few frustrating months of practice and work it now lives in a drawer collecting dust.
Yeah, I also have one, and I'm not really excited for new products from that company, even if it's the only real device in it's field at the moment. The whole configuration app and strange ecosystem they tried to push rubs me the wrong way, and I probably won't be getting the wrist device if I have to deal with that.
"In their head" would be a different matter but that is not what the current technology is focusing on (apart from Neuralink).
Edit: not propagating for any such vision the future! just noticing that wearing stuff on head would be clunky and impractical for true immersion.