Compared to Android 4.2, there are four major changes that 4.3 brings :
1. Multi User Login Capabilities
Android 4.3 is the first mobile operating system to support multiple login accounts from a single device. This can allow users to set accounts specifically for their kids and etc as the master user will be able to control and limit contents and permissions for specific users. This is similar to Windows Phone 8’s Kid’s Corner.
2. Bluetooth Smart
Bluetooth Smart is a “low-power Bluetooth” feature. On Android 4.3 Bluetooth power consumption will be reduced significantly as compared to previous Android versions. This allows users to spend more time on their bluetooth devices like their bluetooth headsets, health monitors, smartwatch without worrying that the phone will run out of battery.
3. OpenGL ES 3.0
The biggest change brought in Android 4.3 is probably the support to OpenGL ES 3.0. Compared to OpenGL ES 2.0, version 3.0 brings in more buffer objects and adds new shading language, increases the number of texture support, etc. This feature will bring much better visual experience to Android games.
4. DRM APIs
Finally, DRM APIs (Digital Rights Management API – Copyright Encryption Technology) allows a number of online video software to offer a new digital copyright encryption technology support. It gives products like Netflix( a U.S. online movie rental system) one less issue to worry about.