That's amazing about your examples is that almost all of them lead to more employment, not less. Robotic surgery? Requires a great number of skilled people to perform the surgery (no difference there, it just makes some things easier in the surgery), and on top of that you need the people to design, build, and maintain the robots. Prove to me you can replace the fairly complex skills of an attorney with a computer and you might have something to talk about - though of course you'd need someone to provide correct inputs to the computer, someone to design, build, and maintain it, someone to design the algorithms and update them with changing legal circumstances, etc. I've already covered you mathematical finance and algorithmic trading adds jobs rather than takes them away. If we could replace the incredibly dangerous job of firefighters with machines of some sort, that would probably be great! But they'd still need someone to direct them, someone to make split-second judgment calls about the stability of a building, someone to maintain/repair/etc. the systems, blah blah blah. Drones may have removed one person from the loop - the pilot in the plane - but there's still an army of people who keep each UAV up in the air, and there's still a pilot, albeit sitting in a room in Nevada or whatever instead of the cockpit. On top of that you've added all of the jobs involved in manufacturing and designing the drones!
These jobs aren't going to disappear overnight, and even if they did, you'd still need that knowledge set and skills to direct the machines/robots on what to do. This is exactly the same issue with xenophobic ranting about immigration: jobs are not a zero sum game.

