In fact, this update file size is 47.6 MB and, from the description in the download screen, reads simply that there is an improvement in performance and stability. In any case, form the file size, so we don't think it's a full update which introduces many new features, although these are not yet well known Update. This android 4.2.2 update is released for Galaxy Nexus, Nexus 7, and Nexus 10 but not for Nexus 4, but we are sure that soon arrive on Nexus 4.
Force OTA Update To Android 4.2.2 On Nexus 7 And Nexus 10This Android 4.2.2 update is now characterized by 5 letters and no longer with 6 letters. It has gone from build build JDQ39 to JOP40D with the kernel which passes from version 3.4.0 to3.4.5 version only on the Nexus 10. We expect the same update come soon also on the Nexus 4 with the same kernel on Nexus 10. Galaxy Nexus and Nexus 7, instead, remain with the same kernel, as you can see from the pictures below.
In order to check if on your Nexus contains the update via OTA for Android 4.2.2, what you have to do is go to settings -> about phone/tablet -> system updates and verify if you are notified of the new update. In cases where this is not yet detected, then you can try to force the OTA update by following this simple guide written for Galaxy Nexus but is valid for any Nexus device.
Force OTA update On Galaxy Nexus Or How to Manual flash android 4.2.2 to galaxy nexus
If you upgrade to Android 4.2.2, do not forget to tell us your first impressions of use.