At one time stereoscopic 3D was just considered to be one topic under the heading of Other Digital Stuff. Now it is the great savior of the cinema, pulling in crowds who are willing to pay an extra charge.
We covered Alternative Content generally, but we will spend some time with 3D on its own. Our bet is that it is not a fade and won't go away. You will need to know what to look for as it evolves to be better.