I started out with open book cases and some of my fabric faded from the sun. I had to throw a bunch away. Also, I used to smoke and the color from the smoke didn't wash out. I wasted a lot of batting and fabric. Now, I don't smoke and have doors on my fabric storage. Works much better. You mentioned tall windows, so fading could be a problem. I saw a posting where she used PVC pipe for rods on a curved wall, but I don't remember where I saw it. Sorry. The idea of lining with flannel for a display wall is a good one.
Sue