Android 4.2 Jelly Bean is a refinement of an already great Android 4.1 OS. On one hand, we have an incredibly smart mobile operating system which takes parts from all of Google's different operations, Maps, Gmail, Location data, and more - and aggregates them in a form that is very useful to people in the form of Google Now.
Google Now, to me, is going to become one of those things that we kind of dismissed in the past - but has become so much of an everyday thing in our lives, we wonder how we lived without it before. I think we're going to see Google Now 2.0 baked into Google's Project Glass - and between now and then, Google are going to rough those edges and perfect it to a damn masterpiece - I'm that confident in it.
Android 4.2 doesn't change too much up, because there wasn't that much that needed to be changed from Android 4.1. All that was required was to just open her back up again, and pull a few levers - and this is precisely what Google have done.
Android 4.2 Jelly Bean has proven to the world that Google is here to stay as the mobile OS king - iOS doesn't compare to Android 4.2, and Apple have a very hard path ahead of them.
Google's UI for Android is so beautiful, widgets, its customizability, ease of use and accessibility make it hard for other players to compete. Sure, iOS is great - but after using Android 4.x, it feels stale, old, and boxed in. Google are constantly refining Android, changing the UI on what feels like a quarterly basis - but always for the better (since Honeycomb, at least).
What excites me even more is what Google will introduce with its truly next-gen OS, Android 5.0. Are we going to see such a leap forward, that we can't even imagine what the UI or features would be? How many more features can Google cram into an already impressive mobile OS? Can we expect an UI overhaul? I don't think we need one, but Google are constantly surprising me.
Google - surprise me even more, I want more reasons to believe you are going to be the leading OS company within a few years' time.