Near field Communication (NFC) may well be a powerful selling point for the forthcoming iPhone 5 as it has emerged that Apple may use the technology for some pretty unique purposes.
A source told Apple blog Cult of Mac that Apple is working on ways to use the iPhone 5 to take over any Apple Mac (and potentially any computers).
NFC has been limited for now to contactless mobile payments and identity management. Cult Of Mac says the plan is to use the iPhone 5 as an identity token with which a user can take over a machine (useful when doing hot desking).
The computer will load the users's applications, settings and data, customising it to their own personal use. When the user leaves or if the iPhone 5 is moved out of range, the computer reverts back to its original state.
Whether NFC will actually be used here remains to be seen as it will very much depend on data transfer rates as well (you don't want the sync to take minutes, but rather microseconds) and the phone needs to be within 10cm rather than say, a more convenient 50cm.
One has to wonder whether Bluetooth (which already equips most recent Apple laptops) or some sort of low power, short distance wireless technology like Zigbee, might not be more appropriate.