I'm looking forward to having something like Spectacles by next spring; the killer app for me will be idiot driver shaming from bike rides (I live in a target-rich area...). Also see REVIEW: Snapchat's Spectacles live up to the hype, but have a ways to go (Business Insider)
"The best thing about Spectacles is their simplicity. Whereas Google Glass tried to cram a computer and the entire internet literally on your face and in front of your eyes, Spectacles just has a camera for recording moments.Snapchat Spectacles review: Wearables have never been this cool
The camera-equipped sunglasses, roughly the size of a pair of Ray-Ban Wayfarers, come in three colors (black, coral and teal), and are more toy than gadget (Snap CEO Evan Spiegel even described them as such)."