The two major constraints on entertainment in the physical world that stop things such as Joe Simpson’s book, Touching the Void, in being successful:
ONE: The local aspects of shops and theatres in the physical world put extreme limitations what is revised by the local public. Entertainment that could be popular nation or even worldwide may not sell enough to ‘earn its keep’ in local distributers, therefore certain areas do not have access to certain entertainment. This is like how at home in Hobart we do not have shops such as Gucci or Zimmermann as there is simply not the immediate demand they need to meet.
TWO: The simple limits of space and time. There are only so many slots on a shelf and hours to screen in a day. Local entertainment industries cannot have something stored just in case one person comes in and wants a copy.
This is why networked entertainment, such as YouTube and Spotify are so great. They cater for the individual needs of everyone.

This video is REALLY good to help understand the ‘long tail’ idea