It’s kinda expected that Moto X will be one of the first smartphones to get the Android 4.3 update. After all, the company is now owned by Google and it’s likely that from time to time, engineers from the Android team are hanging out with Moto folks.
One Android 4.3 build for the Moto X has been caught in the wild and brought to our attention by members of the XDA-Developers community. It’s still not the final firmware and it is not suggested you should try it out, except if you own a spare Moto X unit (with an unlocked bootloader) and you really know what you’re doing.
As for what we can expect in the upcoming update to Moto’s flagship, the sources say that, among other stuff, it will include improved camera performance. Some other things aren’t looking that final though, with test users reporting occasional bugs.
Again, this isn’t something every Moto X users should try out. Actions like these could make your warranty obsolete and potentially bring the phone to the unusable state. So don’t take this route if you’re not sure you can handle it…