One major piece of news is that this new spec fixes the broken key exchange during the pairing process, which made Bluetooth devices vulnerable to passive snoop

One major piece of news is that this new spec fixes the broken key exchange during the pairing process, which made Bluetooth devices vulnerable to passive snooping. [1] It now uses ECDH for key exchange. [2] This is big because one of the main proposed use cases for BLE is medical devices, and now they can be secured. [1] http://lacklustre.net/bluetooth http://lacklustre.net/bluetooth [2] BLUETOOTH SPECIFICATION Version 4.2 [Vol 2, Part H] p. 1342