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Pervasive computing is a vision that has been an inspiring long-term target for many years now. Interaction techniques that allow one user to efficiently control many screens, or that allow several users to collaborate on one distant screen, are still hot topics, and are often considered as two different questions. Standard approaches require a strong coupling between the physical location of input device, and users. We propose to consider these two questions through the same basic concept,doi:10.1145/2557500.2557545 dblp:conf/iui/RateauGA14 fatcat:npthpkc3wbe4zcwjidnghlcroy