Where the display cases are shown in the other topic, so that the comparison is more direct, the boxed display does not seem to have so much light on the leaves. This may be a factor that the customer is looking for. With only one source of style, putting an object that has so much of the poignancy of the early 20th century, it does seem out of place looking as if it should be in a re-make of star trek. This does limit the customers choice.
The styles offered by dreamkeepers are all based on basic case types that can be found in antique shop dating back from the 19th century. all of which can be made with the equipment carried by most framers and materials readily available to the framer.
There are 2 examples on the Framing Workshops in Bath website. Top left and bottom right of the page here;
http://www.theframingworkshop.com/page.php?section=6
One draw back of the L shape back and a 4 piece glass cover is that it can collect dust. This is less visible in the 3+3 format of back and cover. The 3 sided cover can be made on a flat surface and a flexible silicone joint, when cured simply fold into the cover. The back still can have the look of the appearance of the card box, just 3 sides.
Frame Workshops cases employ both a folding/hinge joint and an injection joint (using silicone), but the are many other alternatives a framer could use. All give the framers customers a better range of choices to suit their needs.
Other methods of case construction offer a variety of ways merging styles of frame into a decor product. I agree with Barry of dreamkeepers that the framer can look to methods of display that include 180 deg. and even 360 deg. display as well as good framing.