Well that's pretty scary. I can see one application of this already: casinos in the US are legally prohibited from recording audio on their floors, but have perfectly positioned cameras everywhere. Beyond that, I'm guessing every spy agency on earth will be buying solutions based on this.<p>It would be interesting to know what the genesis of this project was - for example if the NSA or CIA was involved in suggesting to a professor that MIT take a look at this area. This is a very mission-specific technology.