Android 4.2.2 is in the phones of Galaxy Nexus , Nexus 7 and Nexus 10 device owners already. That is according to some Reddit users who have even posted screenshots of their devices running official updates. The update went through over the air, a 47.6 MB update. The update is build JDQ39 which according to the reddit user, added better bluetooth streaming and some tiny bits of negligible changes. So we still dont have details of what the 47MB updates gives.