The benefits of perfect pitch

This Blog Will Change the World gives us a look at perfect pitch:

It is beyond me why everyone assumes perfect pitch is such a wonderful thing. The nearest visual equivalent would be if everywhere you went, you saw a Cartesian plane projected onto the landscape which told you the approximate dimensions of everything you were looking at. While this might amuse people at parties ("Hey Osbert! How high is that mountain out the window?" "157.2 metres." "OMG THAT IS SO COOL DID YOU HEAR THAT EVERYONE HE DIDN'T EVEN NEED A TAPE MEASURE")