10. Beta max
9. Laser Disc Movies
8. 12bit Mini Disc machines
7. 8-track Tapes
6. palm pilots
5. Wide screen projection TV
4. Quadraphonic Sound
3. Cinerama
2. Pagers
1. The Volkswagen “THING”
Just from personal observation...YMMV.
1. The Volkswagen “THING”
Actually the “Thing” had a pretty good run, just not in the USA. It was originally developed as a military vehicle and was produced as such for 15 years (1968-83). It was sold for about 10 years in Mexico as the Safari. In the USA though it was introduced in 1973 and discontinued in 1974. Personally I would love to have one as a SHTF vehicle after the EMP attack knocks all the modern cars out.
Pagers had a pretty good run from the early 60s until cell phones dropped in price enough to replace them in the mid 90s. Hardly a flop. They're still used by doctors in hospitals where cell phones often have no signal.
The Thing had a great run in other countries, the safety regulations killed it (and later the Beetle) in the US.