I think I misspoke. I mean be able to rotate it from a widescreen to a tall monitor. For that I need to put it on an arm.
In financial applications particularly, being able to have up and down real estate is very useful. In GUIs the most important examples for me are: Being able to temporally compare two or more time series. Since time is the x-axis, stacking them one on top of each other is the cleanest way, or if many, the only way. Option chains on different months. Up/Down is the only way, at least with canned software. GUI log files. I don't want to scroll and I need to see as many issues as possible or just information as possible. Then, in linux where most of your work is done on the command line or in an editor, tall monitors are helpful: Seeing large log files where you take the last n lines. You can "more" it, but having a tall screen is very helpful. When programming you want to see multiple functions side by side a wide-screen view is great as in the image in the above post. But when you just want to see one stream of thought, often tall is a better view.
That is nice. Rotating head constantly between them is a workout though. I would have the two on top of each other with the one on top angled/tilted down, with the ones on the sides two 27 inch rotated in portrait mode. Also the cords should be hidden as best as possible neatly. Also, the walls need some artwork and the room a couple of plants.