I suppose as a best case, if you had a loved one who had served, you could make use of this handsome display case to display his actual service medals, flag, etc. if he was denied a government burial, or had chosen not to have one. A lot of war veterans come home very conflicted about their service, while family members feel pride in them. I think that was represented well in the film Flags of our Fathers, based on a true story. The young Navy corpsman who helped raise the flag on Iwo Jima had earned a Navy Cross for bravery under fire saving wounded Marines; he put it in a chest in his attic and no one in his family ever knew about it until after he passed on. One presumes he felt a number of things - survivor's guilt certainly; and other emotions about the fame and attention he received for the simple act of following orders and raising a flag when thousands of other marines and navy personnel were killed doing their duty there.
I could see many "legitimate" uses for a display case such as this, in other words.
Even if left original to the soldier for whom it was created, as nothing more than a collector's item. It's ghoulish, but people collect Silver Crosses and CEF death medallions and German death notices ("death cards") also. If treated with the appropriate respect, they can be powerful reminders that wars are fought by real people, with devastating consequences for the families of those involved.