on my 15.6" laptop which is 16:9, when i rotate the page there are black bars at the top and bottom of comics pages because CDisplay shrinks them to fit the screen, it loses a lot of screen real estate
i also printed up several comic pages last night sized to the screen of the ipad, and almost all of them took up the full height and width, even modern stuff
comics themselves aren't 16:9 sized when turned on their sides, especially golden and silver age comics - which were more akin to the squarish dimensions of a magazine
for a high res large computer monitor, yeah, i'm sure it looks great and you don't really notice the blank pixels at the top or bottom, but 9.7" at 1024x768 resolution screen space is a necessity