The HULC version 2 exoskeleton, now fuel cell powered. I hate to think what this thing costs but maybe in 10-15yrs such technology will be cheap, and allow us to walk around with 20x24 ULF kits on our backs 
http://www.gizmag.com/lockheed-martin-lab-testing-hulc-exoskeleton/16768/

http://www.gizmag.com/lockheed-martin-lab-testing-hulc-exoskeleton/16768/
