331,000,000 cell phones means that number of cameras watching your every move. No need for tin foil. This stuff is real.
watch the vid sky net is almost complete
With that many cameras and that much data on their location/orientation, it is theoretically possible to have very close real-time surveillance of any place where cellphones are used.
Where there are many phones to collect data from, imagine something like a real-time, rotatable 3D image patched together from all the cellphone cameras. Any point in a public square can be zoomed in and listened in on.
It would surprise me if the CIA isn't at least developing such technology.