Re: By the time kids today are old enough to be pilots
"SA comes from high-end equipment as long as your target is out of sight. When it comes close to you, all your high-tech equipment becomes almost useless - and you would need a fairly complex 360° 3D system to remote fight in such a situation. Same when engagement rules ask you to identify your target visually."
That doesn't seem like something that would be a problem at all with existing technology. A "360° 3D system" is not something that would be prohibitively complex. It would simply involve taking multiple camera inputs and piecing them together into a single surround image. With multiple sensor domes on top of and below the aircraft, you could obtain a view in literally any direction from a virtual cockpit, unrestricted by the aircraft's body. This same unrestricted surround view could be transmitted in multiple vision modes as well, such as near-infrared and thermal imaging to see clearly in situations that a pilot's "eagle eye" would be completely blind to.
On the controller's end, the remote pilot could view the surround image using a high-resolution head-mounted stereoscopic display, with motion tracking to enable them to look in any direction just by turning their head. Resolution should not be a problem with such a system, and if the camera feeds provide a higher resolution than the display, they would have the ability to seamlessly zoom their view, effectively giving them telescopic vision. The pilot would likewise have the ability to view a zoomed out, ultra-wide field view as well. There could additionally be one or more co-pilots viewing the same feed and able to look in any direction independently at will, assigning targets and so on. Each could have their view overlayed with a custom HUD providing them with relevant info.
As for transmission lag, computer-assisted aiming and flight assists could largely make up for it, allowing the aircraft to automatically start reacting to a situation instantaneously. Of course, if the plane is doing something that it shouldn't, the remote pilot will still be able to correct it a fraction of a second later. Autonomous control of vehicles has come a long way in recent years, and it stands to reason that it should continue improving in the years to come. Even if an enemy managed to completely jam a remote-controlled aircraft's transmissions to its pilot, we're getting to the point where that aircraft could still fend for itself, or at least make a quick escape.
Of course, this would mainly apply to aircraft purpose-built with remote and autonomous piloting in mind, although systems could be experimented with on existing aircraft as well. I have little doubt that such systems are already being worked on and experimented with for eventual wide-scale use, and that we'll see those systems in place in the coming decades.