Although already a month ago that Google launched Android 4.4, with his new candy, it is not the final version of this version of Android, because they have always been points to polished in some terminals that solve with an update. As it has been seen, Google is already sending one OTA update terminals to Android 4.4.2.
Since Android 4.4 to 4.4.2, 4.4.1, there is some substantial improvements in two areas: camera and security. The first has been aimed at improving the Chamber of the Nexus 5, such as the start time of the application and the speed of approach, which will benefit from other terminals to enhance photographs with our terminals with Android.
In terms of security, they have been several changes in the virtual machine, corrections of software and an overall improvement in this issue. By now we know that this update being already routed to the Nexus 4, 5, 7 (2012-2013) and 10 compiling KOT49H, although it is not yet ne way to factory image.