I'd love to see Halo playing, trash-talking kids get into a real environment and realize they are not in an air conditioned room, eating cheetos, picking up health packs while endlessly sprinting.
I don't get the impression that the young Halo player really thinks combat would be so much fun in real life.
I think modern video games & movies actually help show kids that war is hell. Sure it can be made "fun" when the protagonist is better skilled & equipped than his opponents. But the basics of totally random living & dying is still there. So is the gore. That's actually a lot more exposure to the dark side than kids typically got a few generations back.