News papers in the UK have reported that sales for audio tapes at Currys were down from 83 million in 1989 to 0.1 million in 2006 and hence Currys is going to stop stocking them. We recently discussed how expensive talking toys (in particular dolls) were just twenty years ago. The were based on mini records or endless tapes. By now storage chips are so cheap that a good birthday card can sing you happy birthday.
How long will it take before electronic paper will replace printed paper in the large? At least it is close enough to seriously think about applications and business models that arise.