Self operating machines means that more jobs like "social media manager" and "occupational psychologist" are going to pop up.
Much like someone in the 1850's could not have envisioned that people would actually die from overworking in front of a glass that emits light (computer induced stressed work e.g in Japan) in the same way you can't even fathom the ways we will busy ourselves when we are all free from manual labour (which is not a bad thing).
One thing is for sure; technology has a positive correlation with occupation. Why? Simple. Every problem solved creates a series of other problems. Exponentially. It is how an evolving universe functions and we are caught in this rat race trying to catch up with ourselves.
The problem was never manual labour. That's pointless. Heck it is good to move around considering we are practically dying sitting on our asses.