No cynicism, no snark. What! In box-office terms, that usually translates into no chance. Yet Brad Bird's Tomorrowland, a noble failure about trying to succeed, is written and directed with such open-hearted optimism that you cheer it on even as it stumbles. Bird has kept a tight lid on plot details. And rightfully so. Discovering Tomorrowland fresh is integral to its purpose. But let's say this much. George Clooney plays Frank Walker, a scruffy, grumpy inventor who has closed himself off from the world on his New York farm. But when we first meet Frank, played as a kid by Thomas Robinson, he's on a visit to the 1964 World's Fair and bursting with fun and ideas.??