It was really strange how QNX had a full multitasking GUI operating system for Intel, back in the days when there was a faint chance of competing against Windows, and yet the QNX company had no interest at all in taking QNX to market beyond embedded systems.
By the time that demo floppy was release (1999) Microsoft already had become the 'default PC OS'. Also, Microsoft had Windows _and_ Office, server software to network a company (NT) and for home users about all the PC games they could dream of.
QNX had a very impressive demo, but never really had a chance of competing, otherwise they would have lost from free Linux distributions that had more software at the time.