Nokia's N-Gage, Palm's Foleo, Motorola's Atrix, Apple's Newton MessagePad, HD DVD, Sony's Rolly, Sony's Mylo, Philips' CD-i, Commodore's CD-TV, IBM's PCJr, the Camputer's Lynx, Gizmondo, the Phantom, Atari's Jaguar, MySpace, Beenz - behind every iPad there are dozens and dozens of technology products that aspired to greatness but were successful only in their distinct lack of commercial success.
Some were simply beaten by better rivals, others were just released too early or too late, still more were just plain wrong. Not all were specific products - entire categories of goods and services have been hailed as the Next Big Thing only to disappear with nothing but a handful of miserable early adopters to show they were ever there.
Here, then, are some of our favourite tech fails - products, technologies, concepts and trends - from the past 30-odd years.
Great piece from the Register - how many do you remember? (Sadly, all of them for me!)