Vaporware definition

New software that has been announced or marketed but has not been produced.

(slang, comput.) A commercial software product that has received much advance promotion but whose ultimate appearance on the market has become doubtful because of continual delays.

In the Computer Underground (CU), it is a sarcastic term designating software or hardware that has been announced by vendors but is not yet available on the market.

An advertised product, often computer software, whose launch has not happened yet and might or might not ever happen.