Picture it: youre sitting on the plane or in the doctors waiting room, listening to music on a large, good-looking set of headphones. You tip your headphones forward until the broad white band is now in front of your face, and suddenly your show or game appears on the underside. If Edward Tang is right, this is the new normal. The Avegant CEO is getting ready to launch the Glyph, a $499 headset designed to turn the immersive experience of the Oculus Rift into something decidedly more mainstream.