I don't think that the technical scope of the software or the company behind it were what was being measured against the notion of a "fairytale startup" by the parent, or the grandparent. They spoke of "greenfield tech", "mind-boggling earn out", "10 000 millionaires" but the product didn't have to be an entire operating system. A game could be a fairytale startup then. Flappy Bird would have done it for me