Not much looks different on the second coming of the world's favourite fictional wearable, Google Glass, except for that hulking earbud.
This new version of Glass is slightly more polished and hopefully better specced than the first version given out to Glass Explorers.
The only major change is a port underneath the arm for a new 3.5mm earbud. Presumably bone-conduction audio isn't the loudest thing in the world, so Google added the option to plug a single bud in for your ear.
Google probably figures that if you're game enough to wear Glass on your face 24/7, you're probably OK with stuffing an ugly-arse earbud into your head too. [Google]