On June 30, 2011, the US Patent & Trademark Office published a patent application from Apple that reveals various new advanced vicinity sensors coming to future iPads.
New vicinity sensors coming to the iPad include RFID, Infrared and Ultrasonic. The latter utilizes advanced 3D scanning and imaging capablilities. The advanced sensors are designed to locate office equipment anywhere within an enterprise and could actually devise floor plans to properly located devices. Users will also be able to drag document icons to the printer or videos and/or art to a video projector for a presentation using Keynote or Power Point. Without a doubt, Apple is aiming to further advance the iPad into the enterprise. (...)
For example, one or more of an indoor GPS, a Bluetooth antenna, a radio frequency identification (RFID) device, an ultrasonic device, an infrared device, and so forth, may be used to determine if apparatuses are in the vicinity. In some embodiments, the same technology used to find devices in the vicinity of the electronic device may be used to determine the identification of the device. For example, RFID may be used to determine the presence of a particular device and the device's identifying information. In other embodiments, a first technology may be used to determine if apparatuses are in the vicinity of the electronic device and a second technology may be used to obtain identifying information. More information on this is presented below under "Indoor Global Positioning Scheme."