Google's Director of Engineering for Android David Burke has told in an interview for "The Verge" that Android 4.4.1 KitKat update is coming and it's bringing several improvement for the Nexus 5 camera.
He confirmed that the smartphone's camera will now focus faster and
will aim to select faster shutter speeds, not relying as heavily on its
OIS as it does now.
Besides the improved image quality, the camera app itself will launch
quicker, too. In fact, it does so a full second quicker than prior to
the update. The app packs a new progress indicator in HDR+ mode, which
shows you how the photo processing progresses.
Burke says the update took his team 5 weeks to complete and in that time they've managed to pull off a lot of work. The update is also fixing the face unlock bug of the Nexus 5. Currently,
using facial recognition occasionally causes a bug with the camera app,
which requires a reboot in order to start running normally.