Indeed, and it goes beyond bikes. Maybe driven by the preponderance of hipsters.
Examples, top of my mind:
Shaving. P&G is
remaking vintage razors, selling them for big margins (I know, I set them up with manufacturers of some lines, all in the USA (SW Ohio, actually
).
Command line interfaces.
Music on vinyl.
Polaroid cameras.
What "old" technology or trends would I like to see become popular (that's a qualifier) on current products?
Stainless spokes and polished rims.
Non cushy bar tape.
The three-speed internally geared hub.
Affordable, leather-soled, goodyear welted shoes
Automatic watches (I have a few)
A phone that's pretty much only a phone.
A big, heavy, clicky keyboard, XT style.
Saddle shoes. Suede. Really.
Folks with enough respect not to force you to listen to their car audio from three blocks away.
Neighborliness
Maybe I'm just a truly grouchy retro-grouch.