It's a tech demo. It was never meant to be game. Project Athia is a game. Project Athia has been in development since SE cancelled the last of FFXV's DLCs. This thread has absolutely no basis to exist.
By the way, What were the other gens vapourware?
PS4 - Deep Down
PS3 - Ni-Oh (2004), The Last Guardian (2009), FF Versus XIII aka FFXV (2006)
PS2/Xbox/GC - Starcraft: Ghost (2002)
PS1 - Too Human (1999)
N64 - Mother 3
Duke Nukem Forever, Team Fortress 2, Half-Life 2 Episode 3, are all classic PC examples.
4 ≈ One