There's also a freshened up UI look, a Download Manager App, user-definable App Groups, encryption for data both on the device and its SD card, improvements in battery life while using WiFi and Bluetooth, and the obligatory stability fixes.
Another IBM acquisition, Tealeaf, allows app developers to monitor how every single user uses an app looking for patterns, do they swipe or pinch, do they get stuck at some point in the app or crash it.