An anonymous reader writes "CNet has published an incredibly detailed look at the most critical examples of vaporware ever seen in the tech sector. We're familiar with Wired's yearly round-ups, but this decades-long retrospective look at the most promising of all technologies that never saw the light of day, holds some fascinating technology I've never even heard of, including the wonderfully-named three-dimensional atomic holographic optical data storage nanotechnology. 'Continual delays, setbacks and excuses are the calling cards of a product that becomes vapourware. Windows Vista ran the risk of joining the club, and the terrific multiplayer first-person shooter Team Fortress 2 was in production for almost a decade before it was released in 2007. Devoted TF fans feared it would become a distinguished entrant in the who's who of vapourware. You might say Google Mail is in the running, having been in beta since 2004.'"