While waiting for class two years ago one of my students looked at the back of the room where two unused slide projectors stood. ‘But’, he wondered out loud – having no history of comparative slide projection – ‘how come you have two of them?’ His remark speaks directly to the rapid change from print to pixel and about the transformation of the lecture room, the place where this change has been most sharply felt: pixels are our daily habit, our night-time curse, and our weekend distraction.