You know how you see old people out and about with stuff that is firmly of their era?
Examples:
Headscarves
Suits
Hankies
Stockings
Face powder
Etc
What do you think will mark us out when we're old? Or are the "rules" so relaxed now we'll just look like the young people but wrinkly?
Im thinking smartphones will have wildly changed but we'll still be doddering around with our galaxies
Straightened hair
Those of us who are smokers will truly stick out and young people will be like "omg! Look! An old woman with an actual cigarette!" a bit like how we feel when we see an old man smoking a pipe.