I dont see how people would really like it.
When you are listening you music, you can use your hands and eyes for whatever else you are doing. When you are watching a movie, everything is focused on that movie. Its understandabale when you are sitting on a plane or a bus for several hours, but other than that - it has no really good use.
Voice feeds are going to much farther video.
Video is great and all, just not for portability.