It would probably exist either way.
There wasn't a market demand for computers that would justify the R&D budget that Apollo was given to develop computers to the level that was required to get us where we are today.
Where we are today is a result if the work that IBM did not related to the space program, the work that was done for the space program, and the work that was done because of the space program.
The scenario you're describing only has the first one, but not the other two.