Not sure if you have heard about some kind of Beacons that will be used to guide us everywhere. There are Bluetooth Beeacons, iBeacon, Paypal Beacon, probably more. So here is an attempt to understand some of these things.
The first is this introductory presentation which seems to be extremely popular on Slideshare:
Once we understand the concept of Beacons, there is another presentation that helps us understand iBeacons and Paypal Beacons as follows:
Bluetooth Beacons vs Wifi vs NFC is an interesting article comparing the Beacons with WiFi & NFC. Read it here
Why Beacons may be NFC killer, GigaOm has a good answer here:
iBeacon could be a NFC killer because of its range. NFC tags are pretty cheap compared to NFC chips, but NFC tags are required on each product because NFC works only in very close proximity. In theory, NFC range is up to 20cm (7.87 inches), but the actual optimal range is less than 4cm (1.57 inches). Also, mobile devices need to contain a NFC chip that can handle any NFC communications. On the other hand, iBeacons are a little expensive compared to NFC chips, but iBeacons range is up to 50 meters. Not all phones have NFC chips, but almost all have Bluetooth capability.Many years back there was a proximity marketing craze using Bluetooth. Then the craze died down and everyone started focussing on other approaches for LBS. I also suggested a Small Cells based approach here. Its good to see that we are going to use a new Bluetooth based approach for similar functions.
By the end of the year we will hopefully know if this is a new hype or a successful technology. Issues with battery drains, security, interoperability, etc. will need to be sorted asap for its success.