Macworld – 3D video was the talk at this monthâs Consumer Electronics Show in Las Vegas, but at Macworld 2011, app maker Holographic Audio Theater was looking to promote the idea of 3D audio. The company thinks that âthree-dimensional audioâ provides the most immersive experience, and it was in San Francisco this week to promote an appâNaturespaceâthat it thinks will drive that point home.