Most killings in war haven't involved looking a man in the eyes and shooting him for a very long time. At least as recently as WWI, most deaths (excluding disease) were caused by artillery shells fired by someone who would usually never see his victim at all. That's even more impersonal than killing someone with a drone.
But in those cases you don't know if you actually killed someone or not, you're just launching a shell off into the void. In this case the person pulls the trigger and then watches the carnage live and in IR/thermal. The action of pulling the trigger and the aftermath are inextricably interconnected. As perhaps they should be, but it's certainly not the same as being a gunner in an artillery battery.
