Hitachi Rollerball Interface Concept

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Sony Rolly: MP3-playing robot or glistening, ambulatory Aibo turd?

Another concept device using a very cool system of see-through rollerballs and a back button to do just about anything. They had a few mock-ups and it really makes sense once you see how smoothly everything works with just a ball. Maybe the next iPod can get a scroll-ball?

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