I read about that one earlier. My reaction was something like this. Suppose you had a very bad cough and you couldn't figure out why. I gave you one of these and after two days I could tell you why you coughed and what to do about it.
Sure if I hooked everyone up to this I could like run the matrix but it would be a hell of a lot of information and quite frankly I don't know what good it would do.
Sometimes the Darpa stuff just seems evil because it has to have a military cover. Sometimes it is evil.