A review of Michal Levin's book by the same title, published in January 2014 by O'Reilly Media. The presentation explains the basic ideas of her book with some new examples. Also included: Examples of single-device scenarios as well as multi-device scenarios for Apple Watch. The presentation was first held on April 21st, 2015 at Usability-Stammtisch Berlin (works best with audio, though). Oh, and the book is highly recommended – buy her book!