I did not read the entire (resurrected) thread, but here: AI. In the far future, AIs, or SIs (Simulated Intelligences) will abound to assist people. (Provided we didn't get into a war with them and/or rampant paranoia about them doesn't exist.)
Likely, a "modern" person will have a micro computer directly linked to their brain and the AI would be part of that, so they would have their own personal assistant at all times. Plus, critical workstations would have their own, so that security guy would not neccessarily be looking at 400 monitors at all times, but cycle through them (when not surfing the web), while his security AI is actively "watching" all feeds and has a program that rates security threats. The human is there to provide that thing that AIs haven't yet been able to develop: intuition.
No matter what, with the basics of a a high-tech society, AIs and things set on "automatic" (like traffic: you get in your car tell it where you are going, at it plugs itself into the local traffic grid which just adds it to its massive database and program (of which no human not massively altered could hope to keep track of) and the car goes there automatically, no human error* to cause an accident, just sit back and enjoy the ride, or sleep, I would probably get more sleep. the only jobs humans would be doing in all of this, is the initial programming and some monitoring "just in case" something happens, to provide guidance, if needed. (The traffic grid program would likely have an emergency protocol in place with numerous aspects to deal with all manner of incidents.)
*Except in the initial AI and traffic grid programming, though with enough redundancy checks it could be made to be so much more safer than thousands of individual humans controlling their own vehicles that a death, or even injury, due to a traffic accident would become national news it would be so rare.