Vaporware
A product announced, demoed, and sold that does not, strictly speaking, exist. The roadmap slide's most confident inhabitant. Ships 'next quarter' on a rolling basis.
Heard in the wild
“The integration they sold us turned out to be vaporware — two years of 'next release.'”
Tone check: Danger
Contractual protection: tie payment to delivered features, not roadmap promises. Decks are not deliverables.