The model demonstrated today is a prototype for developers and hardcore technology lovers only.
The "consumer version" of Google Glass, complete with applications and a less intrusive look, is set to be rolled out in the United States and parts of Europe soon.
It's hoped New Zealand would follow not long afterwards.
Making payments with the device has its attractions, but the success of the technology hinges on people feeling comfortable wearing them, said Kieran Waelen, analyst from Mcom, which is owned by Fiserv.
"They don't integrate well into the face," he said.
"[But] the first BlackBerrys weren't used because they were stylish."
The current model retails at USD $1500, despite costing Google $200 to make.
Once Google Glass was being more widely used, the price would drop, but bringing the technology to the masses was very much a work in progress, Mr Waelen said.
"When the smart phone first came out it had no apps. You could call, text and check your emails and that was it."
How it works:
- Google Glass connects to any regular wifi or bluetooth connection
- A tiny screen to the top right of the eye displays the screen
- Tapping and sliding a finger along the arm of the spectacles works as a control to navigate through the screens
- It also responds to voice commands
- The device reads the code on the the bill and automatically makes the appropriate payment from your account, saving a copy of the receipt
