That's a big storage area - and the next room has storage as well!
I noticed that. The cabinet is huge but I like the idea.....on a smaller scale. It sort of looks like a large commercial or retail storage case, but it could just be a large piece of furniture in a large house. I like the way the back of the piece has been painted white like the walls. It makes the back disappear. Of course, with all that glass, one would need to be careful of (possibly) too much direct sun exposure and fading of items inside it. I learned that the hard way years ago.