Saudi arabian tries to patent in germany a remote monitoring RFID implant for human tracking, with optional remote poison release, ostensibly to provide incentive to foreign visitors to leave by the end of their visa. But other uses include controlling domestic undesirables and defectors. Not cool.
Basically, for stereo users, you can assign spatial coordinates/directions for specific audio sources. SO, for a conference call, all the west people on your left ear, all the east coast people on the right ear. Probably can do tricks like also shifting to be more forward or rearward, or farther away.