The next major version of Android is here. Carrying the name Jelly Bean, Android 4.1 puts plenty of new features and performance updates to the table.
Firstly, Jelly Bean focuses on performance. More specifically, improving UI responsiveness. Google has dedicated a whole project codenamed Butter to improving Android performance.
By making the vsync of the screen at a constant 60 frames per second, it makes the UI smooth as, you've guessed it, butter. It even goes as far as to anticipating where your finger is and start drawing from that point to make the UI appear even smoother.....
Google showed two Galaxy Nexus smartphones, one running Ice Cream Sandwich and the other Jelly Bean and showed the huge difference that project butter makes. It's really quite impressive.