Ubiquitous computing is moving away from traditional platforms (PC, PDA, smartphone) to include non traditional platforms such running shoes. In 1995 General Magic designed their wireless handheld interface as a desktop. This interface had limited functionality partially due to the desktop metaphor. Extending the desktop metaphor to a wireless device doesn't work with ubiquitous computing. Mike is advocating the use of existing cultural understanding (magic) to describe the behavior of ubiquitous computing objects. Design principles- every day objects (shoes, hammers, hats, plates), they are familiar, physical, no screen , not human, not superhuman, reinforcing the fact that we don't believe in magic. Ambient orb from Ambient Devices looks like a crystal ball. the Nokia medallion - allows communication. Wands (Nintendo Wii), Hitachi Magic wanted. Concept of wands already exists based on embedded technology. The move towards "magic" devices is already happening. The age of magic is coming. Using the magic metaphor should not be an excuse for poor design.