- Project Butter- This feature will allow the new user interface of Android 4.1 to be extremely fast. Camera is very responsive. Animations are all very fast. Notification Panel is extremely responses, going through list, pitching to zoom, everything is very fast. Multitasking is very instantaneous.
- New Notification Panel- Notification Panel in Android 4.1 has the beautiful new and clean look. You can swipe through or expand the notifications. For replying notification say text message or miss call, you can just swipe down and open up some options and have a reply button there. You can have lot of control over notifications. It is very polished operating system.
- New Home Screen Improvement-You are able to move around widgets and position them accordingly. We can drag widgets which make way for the widget that I want to add and which is pretty cool. It is very fluid and responsive.
- Minor Things- There are lot of new minor improvement things in Android 4.1.For example there are some impressive looking clean widgets, the keypod with protective text and when we search some app we get icon for the app in the search notifications.
- Google Voice Search and Google Now-If you want to do a google search you have to tap on Google persistent search bar at the top and you can begin typing.Google Now is available on the lock screen so you can swipe up to open it. Google Now is in responsive to you. You just speak by asking questions and the results will be displayed on the screen. So it is extremely fast.
That is what is new in Jelly Bean.
You can go through the following video: