Augmented Reality is going to radically change the nature of how people interact, affecting society in drastic and surprising ways.  Glass is only the very beginning.  

I will use it for all of the following:

1. Navigational HUD while biking long distance and skiing.
2. Tag/recognize/identify/research people I meet automatically.
3. Black box audio/video records (e.g., for evidence in a court case or to record an emergent event involving the police).
4. Straight-up teleprompter
5. Slide Previews and talking points when lecturing
6. Display sheet music while playing my trumpet
7. Live tone analysis/tuning data while playing my trumpet
8. Heart rate and pace information HUD for running/skiing
9. Have a virtual pet that only I (or people I share data with) can see and interact with.
10. Live sideband communication
11. Automatic identification of landmarks and structures
12. CounterStrike-like RADAR in paintball/airsoft
13. Ammo counter in paintball/airsoft
14. Automatically tag where I parked my car and navigate back
15. Automatically scan/link any business card I see
16. Automatically look up nutritional information of any food I see
17. Automatically translate any non-English words I see
18. HUD for component status when recording audio/video in the studio
19. Crazy AR games
20. Enhanced vision (compressed spectrum, zoom, wide angle, rear view)

That’s 20 life-changing things (at least for my own personal life) that will happen with AR.  Not can: will.  It’s just a matter of time. And this list took me all of five minutes to compile; I could drop fifty more in a heartbeat.

Imagine a future where you never forget someone’s name.   Imagine a future where someone’s Facebook, Linkedin, Twitter, and a google search about them are already in your eye the first time you meet them.  Imagine a future where the douchbag stranger approaching you at a party has already been flagged a douchbag by your friend downstairs, and can thus be avoided. 

Better, for many of these, it’s a matter of time only as a matter of software.  The glasses are just IO.  The hardware is pretty-much there.  Just watch what the devs do with this.