contact lens displays and the darker side of neuroscience

Two interesting tech articles today:

http://www.scientificamerican.com/article.cfm?id=virtual-reality-contact-l : on the possibility of virtual displays in contact lenses within a couple of year


http://www.guardian.co.uk/science/2012/feb/07/neuroscience-soldiers-control-weapons-mind: which while being a bit on the futuristic side, does raise the issue of the ethical issues which will soon arise as a result of developments in neuroscience, and provides some impressive examples of the sort of things that are already being attempted, for example : 

• The US military research organisation, Darpa, has already used EEG to help spot targets in satellite images that were missed by the person screening them. The EEG traces revealed that the brain sometimes noticed targets but failed to make them conscious thoughts. Staff used the EEG traces to select a group of images for closer inspection and improved their target detection threefold, the report notes.
• A growing body of research suggests that passing weak electrical signals through the skull, using transcranial direct current stimulation (tDCS), can improve people's performance in some tasks.
  "Those who had tDCS learned to spot the targets much quicker," said Vince Clark, a cognitive neuroscientist and lead author on the study at the University of New Mexico. "Their accuracy increased twice as fast as those who had minimal brain stimulation. I was shocked that the effect was so large."
   

 Aside from the ethical issues about the use and power of such techniques, there even then arise questions of responsibility, since if the subconcious thinking of a soldier is used to trigger say a missile launch, is he still fully responsible? A complex future...but a fast approaching one it seems....