A lot of the above comes out of the Defense Advanced Research Projects Agency (DARPA), an agency within the Department of Defence. The “iron man” super soldier exoskeleton is old stuff already. The really interesting stuff is in the area of neural protheses. At the moment the edge of this technology is in artificial limbs that are connected neurally to the brain enabling the user to not only have a fully functional complicated extremity like a hand, but complete with the sensation of touch as well. We have this. With a little imagination, one can easily see the military application to this type of technology beyond mere healthcare. At the moment, it is not within the bounds of American medical ethics or law to apply these technologies to otherwise healthy people, such as young soldiers. The way around this would be to do it off-shore, as was done with the first heart transplants and other risky new technology. Or suspend these barriers during a state of emergency,
The next generation is all about sensory enhancement as described by @Lawn above. Soldiers with night vision, remote motion sensory, dog-like hearing, implanted satellite and field communications, GPS., etc. would be extremely beneficial in recon conditions. DARPA’s Livermore Labs are making excellent headway on this.