Travel to All 50 States of the USA #ThroughGlass
Google sent out an announcement yesterday to all Google Glass Explorers that they are now eligible to refer 3 of their friends to the program. In addition, Glass Explorers that purchased their Glass before October 28, 2013 will be eligible for a hardware upgrade that is said to support a mono headset and future lenses and frames (including prescription).
This may be a sign that the commercial release of Google Glass (dubbed Google Glass 2) is coming soon.
In addition, Google released this marketing video which showcases Explorers using Glass in all 50 states around America.