Ever played the game Crysis? Well, the Armed forces are not too far away from actually having a suit very similar to the one in the game...belive it or not! Dupont and MIT have been working on a system since 2002, the first prototype is very near completion, check out some of the articles:
http://web.mit.edu/ISN/index.html
http://nsrdec.natick.army.mil/about/techprog/index.htm
Already wearing suits similar to this now in certain operations: (LandWarrior)
A vision of the future suit:
Very cool....