Smartphones are useful personal assistants and omnipresent communication devices. However, collaboration is not among their strengths. With the advent of embedded projectors this might change. We conducted a study with 56 participants to find out if map navigation and spatial memory performance among users and observers can be improved by using a projector phone with a peephole interface instead of a smartphone with its touchscreen interface. Our results show that users performed map navigation equally well on both interfaces. Spatial memory performance, however, was 41% better for projector phone users. Moreover, observers of the map navigation on the projector phone were 25% more accurate when asked to recall locations of points of interest after they watched a user performing map navigation.

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The Living Wall project explores the construction and application of interactive wallpaper.Using conductive, resistive, and magnetic paints we produced wallpaper that enables us to create dynamic, reconfigurable, programmable spaces. The wallpaper consists of circuitry that is painted onto a sheet of paper and a set of electronic modules that are attached to it with magnets. The wallpaper can be used for a multitude of functional and fanciful applications involving lighting, environmental sensing, appliance control, and ambient information display.

Previous user studies have suggested the occurrence of symptoms of motion or simulator sickness among active spectators of handheld projector interaction. Using the well-established Simulator Sickness Questionnaire proposed by Kennedy et al. in 1993, we asked twenty-six participants if they had any indication of such symptoms after they watched a demonstration of handheld projector interaction for about half an hour. We show that handheld projector sickness can occur in rare situations, but overall it is not a substantive problem.