Scrolling is kept to a minimum with the home screen spanning both displays.
I really appreciated being able to have a full large keyboard on one screen and the writing area on the other. The extra room made for easier typing.
A Web page can run on both displays as well. The gap between them limits long finger swipes, but that wasn't too bothersome.
On the top screen are the current photos you're viewing, while the bottom screen shows your entire gallery.
In the camera mode, the user controls and viewfinder are on separate displays.