I don't have a smart watch myself but several of my coworkers do, the killer app for them seems to be two factor authentication codes; we've got like 10 differe

I don't have a smart watch myself but several of my coworkers do, the killer app for them seems to be two factor authentication codes; we've got like 10 different accounts at work that need 2fa and instead of pulling out their phones they just use the watch.