Lot's of people who text while driving think it's safe too. You can't take reckless drivers' own word for what's safe or not.
The people in the latter group can be proven wrong objectively by data that shows accidents that occur as a result of texting while driving, whereas the former group is irrelevant because they are simply ignorant.
There is currently no data or at least not enough data to support the conclusion that simply wearing a Google glass (which does not imply use in the same way that holding up a cell phone while driving does) causes accidents.
If the device eventually can improve the "task at hand" when driving then _the police_ is the one increasing risks by punishing people with wearable technology.
The burden would be on the maker to ensure that.
Otherwise, it maybe could allow for safer driving, but it sure would allow reckless facebook/driving.
What if is way more safe to use your voice than your hands to communicate? (and some people is going to do it anyway despite laws against texting while driving)
What if is way faster to change your eye-focus than to move your eyes and head to see the GPS?
Many of you guys commenting here are acting like this thing is black-and-white when is clearly not.
If X requires your attention, it will cause accidents. We already have enough data on that.