Just a few days ago Motorola was among the first to announce it will update its most recent phones (Moto X included) to Android 4.4 KitKat. The schedule is yet to be revealed, but the first leaked Android 4.4 ROM for T-Mobile's Moto X is now available for download. The KitKat ROM popped up on XDA Developers yesterday and seems to be a dump from a developer edition of Moto X. It is stable...
Source: http://www.gsmarena.com/android_44_rom_for_the_tmobile_us_motorola_moto_x-news-7135.php