(The very first thing I would have hooked up on a Goggle Glasses toy would be a rear-view camera, so I can walk around without anyone creeping up behind me!)
Actually, combine that with “watch out for that car” – how about motion sensors? They’d give you a warning if anything is on a high-speed intercept course with you.
Also: continuous real-time uploading of 360-degree imagery – so the police would have video images of the guys who held you up and stole your phone.
A lot more than that. A 2,600 mAh cellphone battery lasts for a few hours of surfing the web, while a 27 mAh watch battery will generally power a watch for six months to a year.
I remember reading about how the Japanese are developing the technology to enable people to watch movies in our field of vision - via tech inside our head. No Google glasses here. I’m sure this will be instantly integrated to our personal phones or wearable tech, but this wont be for another 10-15 years or so.
Let’s say you go to a train station in a strange city. The station knows who you are and where you are going (because you googled it earlier). It directs you to your train, tells you about connections, buys your ticket and helps you find a seat.
Generators take up space, and something running just off of random motion isn’t going to generate very much at all. Just putting in a slightly larger battery is probably more effective in prolonging battery life.