Pixel C team says split screen coming to Android N
Andrew Bowers, director for consumer hardware at Google, had this to say during the AMA:
The team also mentioned working on DisplayPort support over USB Type-C, but it was less clear if that would be part of Android N as well.
We obviously knew that Android N was in the works, because Google never stops development on Android, but this is the first we're hearing about some of the major updates planned for Android. It seems pretty obvious that Google will be working on better multitasking options for larger screens, and there is a chance we'll see something similar to Windows Continuum start to take shape if DisplayPort support comes with Android N.
The question remains when we might see the update. It's certainly possible that we might see Android 6.1 as soon as Google I/O in June, but it also seems unlikely that Google would flip from Marshmallow to N that soon. Maybe by the end of 2016 though.