That was fast, Google has pushed the Android 4.4.1 KitKat update last week for Nexus devices and today Google is already pushing Android 4.4.2 update for the Nexus devices. According to Android Police the update is rolling out for Nexus 4, Nexus 5, Nexus 7 and Nexus 10.
It is not clear what is changed in this update, as the update is a minor one, but according to the report it includes fix for clearing the VM Indicator, fix for delivery of the VM Indicator, various additional software fixes and security enhancements. The Android 4.4.1 update included camera fixes for Nexus 5, the improvements included faster focusing, faster white balancing, the ability to pinch-zoom the viewfinder in HDR+ mode and less shutter lag.
You can wait for the update to reach you or go to the Android Police report to find the download links for the update for manual flashing. The download links include update from 4.4 to 4.4.2 and 4.4.1 to 4.4.2.
Google first released Android 4.4 KitKat at the end of October and within two months it issued the first update as Android 4.4.1 and now the second update was rolling out as 4.4.2 within a week of the last.