A "display window" refers to a glass-covered area on a store's front where products or items are showcased to attract customers passing by. Full definition
That's especially important since we live in a world where even the most sophisticated tablets don't like the idea of displaying windows for more than one open app at a time. (jwikert.typepad.com)
Whether screening room or project space, the large display window in the front allows everything that happens inside the institute to become a public event. (bpigs.com)
For a greater impact, spend a little extra on one that has a clear display window where you can insert a print - out of your book's front cover. (self-pub.net)