Here is an amusing feature, by Anna Jane Grossman, of things that have become or are fast becoming obsolete. She adds a list of such things as:
Carbon paper
Wite-Out
Lickable stamps
Printer paper with holes on the sides
Walkmans
Tie tacks
Dial-up
Sound of the modem starting up
Non-wireless Internet
Diaper pins
Wall-mounted pencil sharpeners
Calculator watches
Mimeograph machines
Manual car windows
Getting out to open the garage door
TripTiks
Stovetop popcorn poppers
Film
Flash cubes
Mercurochrome
Water beds
High diving boards
What other things in recent memory that we used to think were high-tech or way cool have faded away?