Re: No. Just No!!!
The article is focused almost entirely on augmented reality, which involves projecting objects and information over your surroundings, without actually blocking out your view of what's around you. The headset discussed here isn't even intended as a consumer-level device, so it's probably not something your child will be using. Of course, there will be more-immersive VR headsets coming soon as well, which will block out one's view of the outside world, but you of course have the option of not buying one for your child if you think it could result in eye-poking.
On the other hand, I should point out that had you been wearing an AR headset yourself, it might have protected your eye from getting poked. : 3