Android 4.2 changelog updated by Google6
share option for the new stopwatch. While it measures times, counts laps and can do split times, you can even share the results with non-believers. You can even have a countdown timer, run multiple timers and label them. The world clock lets you keep track of the time in different cities from the app itself or from the lock screen. And the new clock widget lets you choose from analog or digital style and allows you to resize it to include the time from other cities. Finally, there is full HDMI mirroring with support for notifications and multi-display.
Coming next should be Key Lime Pie which we should see in May at Google I/O, quite possibly powering the Motorola X. If you want to see the complete changelog for Android 4.2, check on the sourcelink.
source: Google via AndroidCentral