alt Hacker NewsWonder at which point we'll start adding PLB / airtags to clothing themselves. Decent jacket already cost way more than electronics. Satellite communications approaching cost of 0. If you venturing somewhere risky - kinda makes sense to have PLB built in.
Something like that exists with the RECCO system.
https://en.wikipedia.org/wiki/RECCO
Not quite an arbitrary Personal Locator Beacon, but it can help rescuers home in from a distance. It's cheap because the tag is just an antenna and a diode.