vapourware
(ˈveɪpəˌwɛə) or vaporware
nnew computer software that has not yet been produced and which is likely never to be released or not to work as promised
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014