Restore or update your device to the latest build with files directly from Google
The latest update for the Nexus 7 LTE, Android 4.3.1, just started rolling out a handful of days ago but Google has already posted a full factory image for the latest build. Joining the standard Android 4.3 (JLS36C) factory image for the device, the latest image has the build number JLS36I. We still have yet to see the update or factory images show up for any other Nexus device at this time.
The x.x.1 bump doesn't seem to bring any user-facing changes and is just limited to the Nexus 7 LTE at this point, but if you're going to be wiping and restoring your device or just want to be on that latest build, you now have the Google-sanctioned tools to do so.
Source: Google Developers