Sometime after the entree had been served at the opening-night dinner on Wednesday at the 56th Cannes Film Festival, after Harvey Weinstein had pumped half the hands in the room, and Wes Anderson, Bill Murray and Bruce Willis had entered to applause following the premiere of their film, “Moonrise Kingdom,” the pink lights were dimmed, and the waiters began weaving among the tables, carrying large, heavy blocks of illuminated ice. With their tiny interior lights glowing and embedded plastic cups holding haute cuisine soft-serve, it looked as if a fleet of toy U.F.O.’s were landing — or a deconstructed igloo. At Cannes, even dessert is a show.  More from the NYT.