The work of flight attendants is human-generated edge cases. From an important document falling between seats to a passenger that needs calming to spotting and persuading passengers to deal with trip hazards to emergencies, the work of a flight attendant is not just greeting - but even that's a mitigation factor for these human problems. A compliment perhaps, but robotic arms to help lift luggage overhead have never been needed when the system can be engineered so carry-on's limited to 5kg.
Will AI glasses help with heart attacks - perhaps, but when an airline's credibly reported have eliminate cherry tomatoes for a cost saving [1] it'll need to pay it's way.
[1] https://skeptics.stackexchange.com/questions/5935/did-removi...