Hope the devs can tell us what's its all about.
Update: Rooting is not affected and can be achieved following instructions from this thread for e.g
Those having stock ROM, with clockwork recovery, follow this excellent guide thanks to distortedloop.
those having stock recovery, to update:-
-Download the OTA package here
-Rename it to update.zip, and place it on the root of your internal storage
-Shut down your phone, and reboot into the bootloader by holding volume up and powering on
-Choose "recovery" from the list, and select it with the power button
When you see the red triangle press volume up and choose to update