How long before cheaters can buy a specialized robot/deep learning machine that has a high speed camera and servos that they can point at their computer screen where it can watch the screen and work the keyboard and mouse for them? (Or, better yet, the robot plugs into USB providing it's own keyboard/mouse/controller input and video output is recorded via a simple VGA or HDMI...)

I think these physical types of cheating systems already exist for smartphones. Last time I mentioned it, some people hinted at systems you can setup for phones - https://news.ycombinator.com/item?id=21991775.

Perhaps we're just waiting on the right software for this type of revolution to occur in PC gaming. I can't think of what's lacking right now though - all the pieces seem to be in place.