The update is the same as we've seen pushed out to the US Cellular, T-Mobile (aka unlocked), and Verizon models of the Moto X. This means that it brings support for Google Cloud Print to a number of apps, improved battery life, and a fix for Microsoft Exchange syncing errors. The update is rolling out now to all Sprint Moto X users.
This also means that the only carrier model left to get the 4.4.2 update is the AT&T Moto X. Then, Motorola will likely be putting its efforts towards getting the update ready for its other devices like the new DROID lineup on Verizon and the ATRIX HD.
source: Motorola Support