Expo 67 is Celluloid City. In nearly every pavilion of Montreal's spectacularly successful world exhibitionmore than 18 million visitors so farthe viewer is the ultimate target of a projector. Sometimes film flutters futuristically above or beneath him; sometimes images lurk and flicker all around him, caroming off walls, whirring on blocks and prisms, on hexagons and cruciforms. Sometimes movies are even mounted on a plain old rectangular screenbut everywhere there is film, film, film unreeling.
Inevitably, many of Expo's 3,000 movies are straightforward sales-promotion pitches, done with all the imagination of a...