And I don't see how that changes anything. I just see this as a distinction without a difference. People have written software to target buildings, soldiers,

And I don't see how that changes anything. I just see this as a distinction without a difference. People have written software to target buildings, soldiers, tanks, planes, missiles, etc. This is done via radar, heat signatures, cameras -- and software already. It's not such a big change really. I believe the thing you really have to worry about is the proliferation of NBC. It's easier to drop a nerve agent in a war zone than it is to figure out how to make an explody drone to kill your enemies and not you, say.