An interesting question for sure!
I'd say bring them but realize that in the current moment you are in uncharted territory. There's no standard pattern on this yet, and just like the rules for bringing laptops and SmartPhones to interviews have been changing and adapting, I think you want to figure the mileage is going vary widely by the organizations you're interviewing with.
Any interview is generally about:
Showing what you are capable of - in which case, a development capability you are working with is very relevant!
Showing you can connect with those around you and be respectful of the limitations of your work place - in which case, the Google Glass could easily be a hindrance.
I'd figure that it's an area you want to negotiate this way:
Whenever bringing recording devices to an interview, make sure you are in an environment where that will be OK. Traditionally high stakes security jobs are not OK with recording devices. Also individuals may not be thrilled by this violation of privacy. Do two things if you're unsure (1) - figure out the overall rules of the site you'll be visiting, and leave the equipment in the car if the site doesn't allow recording devices (2) - check in with individuals as you meet with them and ask if they mind. Offer to leave the google glass sitting on the table between you, turned off, or stowed in your bag if this is a problem.
Make sure that they are not a point for disengagement - they are a device that has a user interface. Make sure that you are interfacing first and foremost with your interviewers, not with the device. Same rules as any smart phone - don't spend time messing with the device, and lock out any distractions that may happen - for example, turn off alerts or other notifications.
If demoing your work - make sure the demo is prepared well and focuses on your work, not on the tool's overall capabilities. You're not selling the tool, you're selling yourself.
In the end, you want the impression to be "hey, that was a smart guy who I can work with", not "cool toy, weird guy".