What probably distances people as well from the facets of reality in death when they see people die on their screens is that the physicality and the consequences of that physicality are ripped out of the sight of the dying. Maybe I've spoken of it too much on here to an annoying extent already by talking about it on my profile, but seeing my brother writhe around in a semi-conscious state last night as he lost his senses and rabidly cried out gibberish during his attempted suicide gave me a much different sense than just seeing some image of a dead body. There is both that personal, emotion connection to this concept, of seeing death, alongside the physical humanity of seeing a person's body react to whatever damage is being inflicted upon it that also plays a role in the division of our reactions, between the screens and the eyes. You can see a person flung out of a car twenty feet into the air on your screen and simply think "Ouch", and then you can see that in reality and there is an innate tenseness in your head of reactional urgency; your throat will tense, your mind will struggle in the empathy of their pain, your heart will pump to give you energy for action to aid them. All of that is lost when it is viewed without reality, on the screen.