Looking back through the history of HCI, we see that quantum leaps have rarely resulted from studies on user needs; they have come from the passion and dreams of visionaries such as Douglas Engelbart. We believe that vision-driven design is critical in fostering quantum leaps, and it complements needs-driven and technology-driven design by looking beyond current-day limits. Tangible Bits is an eariy example of our vision-driven research. With Radical Atoms we seek new guiding principles and concepts so that we see the world of bits and atoms with new eyes to trail blaze a new realm in interaction design. We know technologies become obsolete in ～1 year, and user needs change quickly and applications become obsolete in ～10 years. However, we believe that strong visions can last beyond our lifespan. Even though we may need to wait decades before atom hackers (material scientists, self-organizing nano-robot engineers, etc.) can invent the enabling technologies for Radical Atoms, we believe the exploration of interaction design techniques can begin today.
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