Spatial Interfaces are highly underrated and misunderstood. In the field where I operate (UI/UX design) there are 2 loud camps: Pro skeuomorphism and Pro flat. IMHO, both miss the point. Spatial interfaces are under explored, even though it's how our brains operate. I'm currently studying the topic of spatial interfaces regarding how our brains work. Or at least, the little bit we know about how memories and thoughts are formed. Space is a centre piece in how our minds operate. If you haven't already, read about the memory palace and how spatial interfaces help our brains remember things better.