Atmos is the new buzzword for seriously juiced surround sound. If you’ve seen Gravity or The Hunger Games: Catching Fire, you’ve already experienced its richness. Previously, sound engineers had to mix a scene’s audio and then spread it across separate channels. Atmos allows them to treat each sound element (e.g., a flying helicopter) individually and move it around, even over and under, a listener. Better yet, Atmos scales down from cinemas to average laptop speakers and devices such as Amazon’s 8.9-inch Kindle Fire HDX tablet. Outfitting a fine home theater isn’t cheap, though. Yamaha’s Aventage AV receiver is $2,000 without speakers. Stores offer a $5,000 Pioneer Elite package including a receiver, speakers and installation. At least Atmos works with your existing headphones. Not all media currently use Atmos, but expect it to become standard.