Android 4.1, Jelly Bean, is the fastest and smoothest version of Android yet. Jelly Bean improves on the simplicity and beauty of Android 4.0, and introduces a new Google search experience on Android.
Here are some new features you will find in Jelly Bean. Some features contain improvements on Ice Cream Sandwich.
Fast and Smooth
Jelly Bean features updated graphics along with smooth transitions and multitasking management efficiency.
Expandable, actionable notifications
The notification bar now features direct control for apps. With expandable notifications you can easily respond to emails, instantly call back a missed call, and share media on Google+.
Widgets work like magic
Jelly Bean allows you to personalize your home screen more easier. As you place widgets on your screen, everything else automatically moves to make room. Widgets also resize on their own if they are too bg to fit on the screen.
Seamlessly take and share photos
Jelly Bean allows you to swipe over from camera to filmstrip view to instantly view the photos you just took, and quickly swipe away the ones you don't like.
A smarter keyboard
Android's dictionaries are now more accurate, more relevant. The language model in Jelly Bean adapts over time, and the keyboard even guesses what the next word will be before you've started typing it.
With Jelly Bean, blind users can use 'Gesture Mode' to reliably navigate the UI using touch and swipe gestures in combination with speech output. Jelly Bean also adds support for accessibility plugins to enable external Braille input and output devices via USB and Bluetooth.
With Android Beam on Jelly Bean you can now easily share your photos and videos with just a simple tap, in addition to sharing contacts, web pages, YouTube videos, directions, and apps. Just touch two NFC-enabled Android devices back-to-back, then tap to beam whatever's on the screen to your friend.
Check out the full features list over at the official Android website.