I'd say there will be no need for Gene Jacks since we'll have robots doing all that, probably in the form of nanobots instead of the anthropomorphic ones movies and sf novels accustomed us to.
Any idea btw who first came up with the term Homo superior? I think the oldest reference I know of is a David Bowie song.
Well okay I googled it. Apparently it's from a short sf story, but now I'm wondering who popularized it, and whether indeed it could be David Bowie.
I had no idea David Bowie had a song about Homo superior, but he has always been a trend setter. It is an accurate description of man-machine melding, as the entity would be superior to unmodified humans. They will be a permanent ruling class - an objective aristocracy as they indeed are objectively superior.
If Gene Jacks cost less to produce and maintain, then our masters will prefer Gene Jacks to robots. It is all about trade-offs. One reason for mechanical workers replacing humans in certain occupation is due to cost/wage increase by government policies of child labor laws and minimum wage policies. Men, even Gene Jacked men, can perform more versatile functions, while robots tend to have extremely specified, hence limited, scope of operation.
Yes, I rememeber some comedic skit, might be from a movie, where a character was saying something along the lines of "humans are better (cheaper etc.) than robots because they are self-cleaning, self-maintaining, self-propagating" etc. :P