This is part of our Road Trip 2017 summer series “The Smartest Stuff,” about how innovators are thinking up new ways to make you — and the world around you — smarter. I lean back against the gray, microfiber-lined cushions inside an egg-shaped pod, and prop my feet on the matching footrest. Black headphones fit snugly over my ears as a spa concierge taps on a Samsung tablet mounted beside me. “This meditation dome is your personal