Just got a first look at a 2018 Anthem 45B.
One of the changes was the move from "dual" rear cameras (one looking at the hitch and one looking at the horizon) to a single rear digital camera.
In the 2017 you could switch to the two views via a dash mounted switch. In the 2018 you now use the touch screen to choose your view, and there are 3 rear views to choose from, hitch, backup, and horizon (see the right side of the screen in the rear picture).
But that's not all, there are now side mounted cameras that provide left and right side views, and also provide true 90 degrees right and left views. The touch screen provides a variety of view options to choose from, see the attached images for more.