Having recently heard "magic" being used over and over again in several contexts, I was looking for a concise expression of what it means to me, covering aspect

Having recently heard "magic" being used over and over again in several contexts, I was looking for a concise expression of what it means to me, covering aspects of design, imagination, the work it takes, etc. .. and sort of came up with this -- Magic is about what happens where you aren't looking. A "magician" literally directs your eye somewhere and works her "magic" elsewhere. The iPad (or the radio for that matter) is "magical" 'cos you never look at all the decisions, and even sleight of hand, that go into creating every detail of it. () It takes a thorough understanding of the regularities of your world to create something magical. Without these regularities, there is no predictability and no control possible. And the magic happens when you hide it all and hide it so well that nobody notices ... like a master artist masking all his sources of inspiration in an "original" work. In particular, if your critics say "oh I could build that over a weekend" and you know for yourself how complex the thing is and all the myriad details that you might be slipping right past your critics' watchful eyes, you've probably have created something "magical". () For "sleight of hand", watch closely the notch that magically appears and disappears when you open/close a "folder" icon on iOS. Watch the home icons fly in closely and see if it matches what you thought they were doing before you looked closely. Movies and computer games have lots of such "tricks of the trade" as any movie buff who bothers to find continuity or physicality errors in movies will tell you. Such sensory "sleight of hand" even works because your brain has loads of such tricks as, for example, visual and aural paradoxes have shown us.