One of the features of the new Nexus 10 is that it will be "shareable" which, from what I can tell, means that Android will be a multi-user OS. Exactly how Android will handle multiple users I don't know, but I've been craving this feature for a long time.
Any ideas whether this feature will be part of the core of Android 4.2, or if it's just for Nexus 10? I wish I got this on my Nexus 7.