From the little time I passed on it I can see
- they made the font of the icons on the tapestries smaller
- their is a new animation for overscrolling in tapestries (if you swipe towards the right when you are already at the begining you will see the tapestries and icons wiggle)
- when dragging an icon from the app drawer to the home screen, the App Info button at the top now has a black background and, most important, is now functional
before it was there but it was impossible to drop the icon on it
- I'm not sure of this one but it seems the animation when closing the screen is longer and smoother
I hope this does not mean that Jelly Bean is still like 3 months away...