I repeat, it is just a toy
To all of those who think that technology alone wins wars, have a look at the history of the Mongols. When they took on the Chinese, they took on a foe who was numerically - and technologically - superior. The Chinese had gunpowder and the Mongols did not. The Mongols won. Oh, and at the beginning of WWII, the Japanese had the best air force in the world.
Putting intelligent people in administrative positions where they count beans, tick charts and come up with yet more regulations is stupid. How on earth do you think people will get enough experience to understand the tactical and strategic issues unless they have experience in the field? You can't run a war as if it is a video game.
The assertion that 'Anyone who likes shooting guns is pretty brain-dead anyway, and of no value in a guerilla war, or in a conventional one, come to that.' This is an insult to soldiers everywhere. Treating soldiers like cannon fodder is precisely why intelligent people prefer non-combat positions. No matter how carefully you plan, sooner or later someone is going to have to start shooting. Intelligent people, properly trained, can make sure the bullets do something useful. As I understand it, US forces are prone to panic firing. This means they are badly trained. Why are they badly trained? Because no one intelligent is in charge of the training. No one sees the need to train them so that they respond correctly under fire. There was never any need for them to call in air strikes to deal with snipers on rooftops. Haven't the US forces ever heard of counter-snipers?
I predict that what will happen if this weapon works is this. The US forces carrying these weapons will come under fire from a sniper. Because they are ill trained, they will indiscriminately start firing this new toy. Yeah, it will kill fewer civilians than an air strike, but that's all. It isn't really a weapon, it's a propaganda piece.
Until the US army starts training its soldiers properly, until it re-organises its structure so that it has proper regiments, and until it makes combat roles the most important ones, then it will have learnt nothing.