a progression

Just a strange little thing I've noticed driving around. Often, every small town has one particular type of business. Over the past 20-some years, there's been a progression:

late 80s-early 90s it was movie-rental shops - every wide place in the road had them
mid to late 90s - tanning salons
late 90s to early 2000s and somewhat still today - nail salon places (though more and more, you're seeing those as little outrigger shops inside larger grocery stores or places like Wal-Mart)

and now, it's those "e-cigarette" places (or "vape shops" as they seem to be called around here). I have no idea how popular these things are and if there's enough demand to keep the places open - it seems the prior incarnations (movie shack huts, tanning places) tended to die out, at least in the really small towns, as either the fad died down or the technology changed.

Makes me wonder what's coming next. Maybe 3-D printer shops, that let people come in with an image file of whatever they want, and they'll make a plastic replica of it?