Yes ! Jelly Bean Android 4.1 is superior compared to the previous Ice cream sandwich 4.0 the video clearly shows us that.
-Project Butter is a complete success, the touch interface is improved to be the best.
-Touch comparison made to the Galaxy S III(running ice cream sandwich) showed that Nexus (running Jelly bean) was faster even though S III is quad core & Nexus is Dual core. Thus Jelly bean is superior !
-Notifications management has improved a lot.
-The Voice search assistant is much faster compared to Apple's Siri on Iphone 4 .
-Camera interface is new and improved.
-Web browsing is as smooth as butter thanks to Project butter.
-Automatically re-sizable App widgets is also very much helpful when your arranging apps.
-In a Nut-shell Jelly Bean Android 4.1 clearly beats the former Ice cream sandwich 4.0 ! so ITS A MAJOR UPGRADE !