Motorola will unlock the bootloader on the Verizon branded second-generation Moto X
Unlocking the bootloader will allow those with the device to customize the phone by flashing custom ROMs. Considering that the carrier-branded second-gen Moto X is not receiving the update to Android 6.0, perhaps this is Motorola's way of trying to stay on the good side of Verizon customers.
As for those with the AT&T version of the phone, it seems that you are out of luck on both accounts. Your second-generation Motorola Moto X won't be updated to Android 6.0, and the bootloader on your device will remain locked. Don't blame us, we're only the messenger.
source: Motorola via SlashGear