The product manager for Android, Hugo Barra, announced in his profile of Google + that Nexus have been updated on the occasion of the Android 4.2.2 arrival for their devices the official list of changes of Jelly Bean, with all the news since its first version 4.1 Android.
In the list are all the innovations that Jelly Bean has received over the last few months since he was born with Android 4.1 in June of last year and with the changes and improvements welcomed with 4.2 and 4.2.2. It is available on the official website of Android and is completely in English.
The most important innovations already saw them here, for example in 4.1 Android was its optimization and fluidity that offers Project Butter, expandable and Google Now notifications. Android 4.2 its most important innovations were Photo Sphere, its new keyboard with Gesture Typing, support multiuser to tablets, the screen saver and the new Quick Settings toolbar. And in the latest version of Android 4.2.2 its innovations were security USB debugging, show the time remaining on Google Play downloads, and switches in the Quick Settings toolbar.