Surplus Entertainment?

Several years ago,
in the era of video, CD's and DVD's,
probably before the advent of Blu ray, 
it became mildly fashionable
to ask another 'How many man hours
of entertainment are there on your shelves?
How much of it have you watched
and how much of it just sits there
having no notice taken of it?'

The answers to which,
if ever they were given,
were often embarrassing.

The 'surplus entertainment'
that sits on a shelf that I prefer
are books. Unlike digital media,
and anything requiring electricity,
they need only the ability to read
for them to be enjoyed,
their age does not matter.

In fact because of 'the cannon effect'
the older some books and authors become
the more they are revered
for influencing later literature;
with influence there is no surplus
-greater age makes it stronger,
and reveals how easy changed
the modern world is.