That didn't take long. Just 2 days after Justin Case released a root method for the Moto X, Droid Ultra, Droid Mini, and Droid Maxx, he's already back with a hack that bypasses write protection. By disabling the write protection afforded by the bootloader, it becomes possible to flash 3rd-party ROMs, themes, and other mods. In other words, the flood gates are open for the modding community.
Much like MotoRoot, PwnMyMoto is packaged as a single app that must be sideloaded with adb.