Moto X camera
Apparently, Google and Motorola will usher in a new digital imaging technology. It's a mix of post-processing and better light capture and it's supposed to be a big step forward in moving forward in digital cameras.
It might also be the reason why the X-Phone is using an older processor. The newer ones don't support the technology yet. So in the end, processing power might have been compromised for a better camera experience.
Here is the Anandtech link with all the details.