I think the vicarious warfare you mention Chengora will be a reality. You are exactly right about using video games to train people, as the US Army has recently (past 2-4 years) released a game that is in their interest - “America’s Army.” It seems that the benefits are many, desensitizing among them. Not to mention that it is a branding of the Army itself, a la any corporate marketing scheme: Army of One slogan, similar ads that ring with familiarity every time you see them, a logo, etc…
Now, while I think it will happen, let’s at least suppose it happens. Robotics and vicarious warfare are now a reality. Since we would not be experiencing as many human casualties, and instead suffer financial loss, would we be more or less prone to go to war?
Also, robotics and automated weaponry aren’t necessarily better than humans at combat, they just have a different set of strengths and weaknesses. Such as: the need for battlefield mechanics/robotic experts; EMP shielding; anti-hacking protection, and so on. The distance that is created between the warrior and the battle almost allows for even more unfortunate circumstances, i.e. communication breakdown. I would think a squad of humans would be able to adapt easier than a squad of automatons behind enemy lines.
I can almost see it now, though: A lone drone traversing the battlefield, resplendent in its awesome weaponry. On closer inspection you see an AOL logo and an Intel Inside! icon on the hood.