In the convergence of cinema and mobile technology, Honor and Arri are preparing to answer a question they have spent months carefully posing: what happens when a smartphone is built not around communication, but around the art of moving images? On July 28, the Honor Robot Phone — glimpsed at the FIFA World Cup final and the Shanghai International Film Festival but never fully explained — will be formally unveiled, marking a moment that may say as much about where the smartphone industry is heading as it does about any single device.