Google Glass Owners Get Free Hardware Upgrade

Google has started sending out invites to Google Glass Explorer Edition owners, offering them a one-time swap of their device for a new version. Everyone who purchased the original Explorer version prior to Oct. 28, 2013, is eligible for the swap.
While the swap is entirely optional, it's free and it bring several improvements. According to Google, the new Glass Explorer Edition is a bit faster, more durable, and compatible with upcoming prescription frames.
The new Glass is also compatible with new accessories; on the other hand, old accessories might not work.
For any other questions about the swap, check out Google's official FAQ page.
Google recently invited another round of developers to purchase Google Glass. The cost of the device is a hefty $1,500, but as you can see above, joining the program early can have certain perks, such as getting a new version of the hardware for free.