If a compact computer case isn't what you're looking for, the new MEG Alchemy 700X from MSI may appeal to you. The company brands this as world's first curved gaming PC case and it's definitely a unique design. At the moment, it's unknown if MSI will put this model into production.
The MEG Alchemy 700X might be a good choice to those that enjoy showing off their PC's premium internals, like RGB pulsing graphics cards, motherboards, RAM - nearly every PC component can now be had in an RGB variant from some firm or other. The design looks like a 32-inch (approx) curved monitor. Beneath the transparent tempered surface there are a stepped trio of mounting surfaces for your choice of components. It is possible to fir a full ATX motherboard, two 2.5-inch SSDs or HDDs as well as one 3.5-inch storage device, a sizable LCS, and most modern graphics cards.