The original Moto X was released over two years ago, but since it features an almost untouched version of the Android operating system, it was supposedly easy to get the updates working on it. Still, it was previously reported that this phone would skip the original Lollipop version and would be updated to the newest version of the OS known as Android 5.1 and now, users of the Verizon-locked version will be able to get the update. This newer version is supposed to fix most issues found on the previous version and it includes some minor UI changes. Of course, since this phone currently runs on KitKat, users will be able to experience the visual overhaul brought by Google's Material Design.
The software version is the 222.21.39 and interestingly, it was reported that instead of receiving a notification when the update becomes available, users will have to check it themselves in the About phone section of the Settings menu. The changelog includes all of the changes introduced with Lollipop like the new animations and 3D views, 64-bit ABI support and improved runtime. Additionally, it includes Android security patches (probably against Stagefright, although it's not specified). The UI improvements from Android 5.1 include some new volume settings panel icons and pull down menus for the Wi-Fi and Bluetooth icons on the Quick Settings.
The minimum swipe distance has been increased in Ambient Display mode, preventing unwanted interactions. Volume controls have been changed and now Interruption Controls have been added to make the phone silent until the next alarm (if it's set in the next 12 hours) or until the programmed downtime is scheduled. The volume also includes a bell icon to adjust the volume in different situations like notifications, call or multimedia playback. Finally, it includes some additional protection against theft, even if the phone is reset to factory settings, users will be prompted to input the Google account that was associated with the device, therefore preventing unauthorized reactivations of a lost or stolen phone. It's always good to see older devices getting new software, as supporting these devices could help the fragmentation of Android that is present until now.