Mr. Lucas predicted that blockbusters would eventually become big-ticket events, like ballgames and Broadway plays, and that the rest of the movie business would migrate to online video — a trend that’s already begun to happen. Mr. Spielberg offered a more radical vision. At a time of ubiquitous screens — video, movie and computer — he predicted an end to on-screen entertainment. Instead, he said he thought we’d have a kind of enveloping, wraparound entertainment. - Tom Himpe