ZombieDeadNoMore said:
I wouldn't be surprised if the American military is already conducting experiments for these sythetic limbs and how to combine them with weapons for future combat efficiency.
There's certainly military use for it, in fact big projects are working in these area for the funding alone. However, the uses are not what you might imagine, they don't work on hidden gatling guns in arms. The primary use of "augmentations" as of now is to support already existing structures using partial exoskeletons (making it possible to carry a lot of weight over long distances without developing fatigue), full replacements are currently still trying to catch up with the body's very own standards.
Not only is your body tougher than it looks like, especially the bones, it's also pretty light considering its durability, it can regenerate on its own and maintain itself, and all limbs have a safe power source. Not so much with existing prosthetics. Complete arms might have decent functionality (sense of touch aside), but you'll need to carry a little engine with you at all times.
Of course different body parts bring different challenges with them, i.e. replacing an eye is complicated because of its nerve connection, replacing arms because of the muscle power. Either way, today's designs are nowhere near compact enough to work like in fiction.
TL;DR
So yeah, as of now exoskeletons are actually more interesting for the military. They're simpler in design, maintenance and compatibility and your soldiers don't have to sacrifice any limbs. I think it's more likely to see Ironman's powersuit in the future military than replacement limbs with superhuman powers.
