Apple Kills the Headphone Jack?

With its announcement of the new iPhone, Apple has abandoned the headphone jack in favor of the Lightning port or Bluetooth listening devices.  Some people are claiming that this means that headphones are going to become obsolete (like the iMac made floppy discs obsolete at the beginning of the millennium) while others claim that the hassle that this change will cause will lose Apple some business.  Do you think that Apple’s decision heralds a bigger shift in the world of technology?  If you use headphones in your classroom, are you ready to make the switch if you need to?