Anecdotal evidence for you. I've tried driving in it a few times and wearing Glass wile driving is very distracting during the night time. Even when the glass w

Anecdotal evidence for you. I've tried driving in it a few times and wearing Glass wile driving is very distracting during the night time. Even when the glass was switched off every light was reflecting on the sides, it was distracting me from driving and in around twenty minutes (I was driving to Tahoe) I've started getting a headache and felt slightly nauseated (not normal for me, I can read in the car fine, without feeling any nausea). It all right during daytime, you barely notice when Glass is off and using navigation during daytime is also Ok (better than looking at a cellphone, worse than having voice-guided navigation).