When we first hear about the Android 4.4.1 update, it sounded like the update would be hitting the Nexus 5 first, because all of the changes that were detailed focused specifically on that device's camera. But, it looks like the first update to KitKat is also rolling out to the Nexus 4 and the Nexus 7 2013 (LTE model only right now), and the manual update packages are available.
As yet, we haven't heard reports of the updates rolling out to the Wi-Fi Nexus 7 or the Nexus 10. So, we're assuming that there are some bug fixes in the update related to mobile connectivity. We have to assume that because it doesn't look like any of the camera improvements
for the Nexus 5 have filtered down to the other Nexus devices. We tested out the camera on a Nexus 4 before and after sideloading the 4.4.1 update, and we didn't see any difference at all.
In fact, we didn't even see the new progress bar when taking an HDR photo. We can understand if the other fixes aren't coming to other devices, but that was one feature that would have made sense to be on all devices.
If you want to do the manual update on either a Nexus 4 or Nexus 7 (LTE), you'll need to make sure your device is running Android 4.4 build KRT16S, then just follow the same old instructions