Η Google seems to be working on a number of new features for their cameras Android, such as face detection and the ability to explwork photos RAW.
Possible new camera features spotted in the source code of Android by Josh Brown and Ars Technica. The updates it will be part of a camera API that any manufacturer could leverage, allowing all Android phones to benefit from these additions.
We can not know whether Google is going to bring the new features to the KitKat version, but it looks rather unlikely to be ready in time.