If you are attending a sporting event (or anything really) and missed something, then you could rewind and view it or save it. The recording would not distract the user at all, it would be taking place in the background and would never be uploaded to the internet (by default). It's like having a photographic memory upgrade, except you can also share it.

Maybe have a feature that records up to X minutes of video and overwrites it unless the user decides to manually save part of that video.

Even during sexy time, overlay a face of gwyneth paltrow onto your partner.

How about threat detection? Any snakes or dangerous creatures could automatically highlight in red and a warning message could pop up "Don't step here!".

The "dorky" argument is just a societal norm. They have many plans for less dorky looking versions. The eventual use of this would be built into your eyeball or a contact lens. Yes, it's a halfway scary future but our children will not see it that way. I'm not saying it's the right way to go but it's worth discussion.