There is a bit of confusion as to whether or not unlocking the Moto X Pure Bootloader will void your warranty. Motorola has a developer program. They will maintain the warranty on developer devices where the bootloader has been unlocked. The Moto X Pure is NOT a developer device. When you go to Motorola's website to unlock your bootloader you will have to chose to void your warranty twice. Once you have given Motorola your unique device ID and have received your bootloader unlock code you have officially voided your warranty.
Motorola adds a Warning boot screen to alert vendors that the warranty has been voided. Technically you can remove the boot screen, and you can revert to stock and relock your bootloader, but you still run the risk of Motorola not fixing a device even if the issue is hardware related and not software related. Remember that unlocking your bootloader makes it easy to install unapproved firmware to the phone which can permanently brick your device. If you have bootloader unlocked your device and checked the box to void your warranty Motorola may not fix your device no matter what the problem is. Just be careful folks!