Launch date: 2001 (announced)

Fatal flaw(s): Expensive, heavy, cumbersome, eye-strain-inducing

In theory, the Olympus Eye-Trek FMD-700 sounded like a great idea. Throw on a pair of shades and you can replicate the experience of watching a 52-inch television set. In reality, however, it was an exercise in patience. Users reported that after 30 minutes of viewing, their eyes would begin to strain, causing them to take a break. Also, you would need to position yourself very close to your video source of choice. Reviewers claimed the sound left a lot to be desired and would-be early adopters balked at the $1,200 price. It's no wonder Olympus hit the kill switch before bringing this to market.