The Economist's latest Technology Quarterly has an article on the "future force warrior" (which you won't be able to read unless you subscribe, unfortunately; but if you Google the phrase you'll come up with a whole list of public sites). The gist of it is that the U.S. military has decided it needs to protect its soldiers better (about time, too). The technology bug has bit them, however, and instead of just investing in more Kevlar body armor, they propose turning each soldier into a walking internet node (wireless, of course), complete with sensors to tell not only where he is but how he is (vital signs, asleep or awake, etc.), portable power sources, all under lightweight Kevlar armor plates (black, of course); and with a fully integrated night vision/heads up display with video feeds from robot drone scout planes, and a data link to every other soldier and vehicle.
I'm sorry, these guys have been reading too much science fiction. They have seen Matrix and Star Trek one time too many. I'm not suggesting that your basic GI can't handle all this; with training, he probably can. I am suggesting that the designers have lost sight of the K.I.S.S. principle, and of the fact that the more complicated a system is, the more likely it is to fail in unexpected ways. I do not think it's a coincidence that the picture of the proposed outfit looks exactly like an Imperial Storm Trooper, only in black.
These designers are the same people who thought the Star Wars anti-missile defense was a good idea, despite the fact that it would have required tens of thousands of lines of software code which couldn't be debugged except under fire. Virtually every computer programmer in the world thought it was a Bad Idea, and so is this. This "battlesuit" - yes, they use the term - is so complicated that the likelihood of system failures is quite high, and the early wearers of this will be, I'm sorry, sitting ducks. The only good thing is that they'll be sitting ducks wearing Kevlar armor. In addition, if the whole thing is based on the GPS and the wireless data link, what does our soldier in his battlesuit do if the other side comes up with some easy way to jam the transmission frequencies?? Or simply blow up the transmission towers? Wireless still required line of sight, last time I looked.
Go back to the video games, guys, and just buy the boys overseas some better armor. The lightweight Kevlar armor plates are the only good idea you've come up with. The really good idea would be to come up with some way to settle international disputes without shooting at people, but that's apparently way too far out.