Motion provides meaning Motion respects and reinforces the user as the prime mover. Primary user actions are inflection points that initiate motion, transforming the whole design. All action takes place in a single environment. Objects are presented to the user without breaking the continuity of experience even as they transform and reorganize. Motion is meaningful and appropriate, serving to focus attention and maintain continuity. Feedback is subtle yet clear. Transitions are efﬁcient yet coherent.
So is motion design all about making things bounce around on the screen? Far from it. Not only is motion becoming increasingly important to interface design, it’s starting to drive the entire UI. Can you imagine Facebook designers presenting their iOS Paper app as a static layout? It would look pretty lame. It’s not until you see all the components in motion that the interface even makes sense. The animation is the UI.