(((Vaporware deserves its own book.)))
http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9083058
Link: The Top 15 Vaporware Products of All Time.
12. Sega VR
Before the madness of the dot-com boom really got under way, the serious buzz was all about virtual reality. Aside from the movie The Lawnmower Man and VR cafés springing up in tech-friendly cities, a potential battle was shaping up between two giants of the video game industry, both aiming to bring the wonders of virtual reality gaming to the home.
Sega had decided to create the Sega VR as a virtual-reality add-on to its wildly popular Genesis system. Although the twin-LCD headset made the player look like a cross between Battlestar Galactica's Cylons and Knight Rider's KITT, it was one of the sleeker-looking VR headsets of the day. And, by all accounts, that was the best thing about it. Despite ambitious specs, including 320-by-200-pixel resolution, head tracking, and a color display, the few people who tried the system outside of Sega–mostly at trade shows–were far from impressed. While the Sega VR did meet its specs on paper, in practice the images were a blurry mess. The company scrapped the project in 1994. (But not before making an arrangement to offer the Sega VR as a prize in an Alpha-Bits cereal contest. What the winner actually got is a mystery.)
Sega probably breathed a sigh of relief when a year later Nintendo's Virtual Boy also flopped spectacularly (check out the original Virtual Boy TV commercial)....