It's possible that Project Glass glasses could obscure your vision or distract you, but somehow I don't think it's as bad as actually moving your entire visual field into your groin. Also, the software could help mitigate this issue by a) detecting when your speed (via GPS) is high and disabling any dialogs that overlay the center or b) just keeping most of the overlay up in your peripheral vision.
It is also unlikely these things will always be recording everything due to battery life alone. Best case, they sleep until woken up by notification, alarm, geo-fence, or some other sensor. But recording video non-stop? Maybe you'll get 1 hour of battery.
Most of the concerns I'm sure are being considered, as well as issues people haven't even raised, like long term biological effects. Google is not run by idiots.
That's actually a very smart implementation and solution, instead of putting a HUD interface over an entire lens, like we all thought these sort of glasses would work.
Show someone repairing a car and the glasses display vital information while both hands are somewhere on the engine or show someone cooking a meal while a chef from the other part of the world is watching and giving advice.
You are on holiday in a country you don't speak the langugage of and the car breaks down, you say "find me the nearest mechanic" and you stream live to a garage where someone sees what you are seeing and sends help with minimal "conversation"
It gives new meaning to "if you see something, say something". Or, "if you see something, just keep looking at it, and an agent (robot?) will be automatically dispatched".
If these glasses become pervasive enough in our society, not wearing them will brand you as suspicious.
It's a far cry from being officially branded as a person of interest, but if you don't have a mobile phone, you're out of mainstream society.
Slipper slopes aren't always that slippery, but sometimes they are. It's just a possibility, and possibilities are fun to think about.
Woah! Matrix takes this one step forward where the agent takes your body! Interesting idea.
The potential is that of cellphones to an even greater power.
I can't help but fear it will fail and be considered taboo for years.
But really I want the ability to better re-visit a fairly small number of specific memories, ones that I'm pretty confident I remember the emotions and what happened well, just wish I could see them better.