Everything seems idyllic as Hello Tomorrow opens. The new half-hour sci-fi series on Apple TV Plus imagines a retrofuturistic vision of the future, with all of the hope and optimism that a Tomorrowland-style 1950s can muster. Technology has made life perfect: people drive around in hover cars that look like Cadillacs, robots deliver the mail and serve beer, businessmen use jetpacks to get to work, and all kinds of quirky gadgets make household chores painless. There’s even a cartoon bird…