Think about the bed you sleep in right now. Mattress, box spring, headboard. Booooring! Now imagine a bed that listens to your heartbeat and plays an LED light show for you. A bed that syncs up to your smartphone and vibrates with the beats as music blares out of four speakers. And imagine that it’s a temperature-controlled waterbed. You just imagined the new Tranquility Pod ($30,000) from Hammacher Schlemmer. Its egg shape does offer one disadvantage. Nowhere for farts to go.