Are you at a lost for what to do with that large two story window? I recently was approached by a friend for some suggestions. She has a similar window (to the one pictured) and here is my suggestion to her.
Now, to finish it off, I would put a roman shade (my preference is woven) behind the panels. It should be hung at the same height as the top of your panels so as to create a unified line across the window. This will help pull all the elements together.
Here is a mock-up I drew up if you have this type of window.
When you enter the room you'll eye will be drawn to the back of the room where the window is and to the views to the outside. And, if you have a ceiling fan in your two story room, I would replace it with some sculptural (like the lantern) to give the room some presence. You have the height so you might as well maximize it!!
Hope this helps!
PS: Drapes shown are PB Velvet Panels. Lantern can be found here.