We’re so bombarded with ads, news, messages, airplane and traffic noise, rudeness, and tempting sights and smells, here’s a prediction: Someday we’ll have personal high-tech force fields that selectively screen out undesired sensory experiences. No, not some combo earplug-blindfold-noseplug deal. But a kind of programmable Sensory Sentry or Filter Field — a Globe of Obliviosity? — that lets you have peace and quiet no matter where you are or what you’re doing. Unless, of course, there’s some horrible threat, like that car cutting you off, or guy with the gun. A sort of all-energy version of Maxwell Smart’s “Cone of Silence” only it’s to keep you from hearing the outside world, instead of the outside world hearing you.