Innovation like this gets naturally shaped and filtered within society so it becomes acceptable for the most. Just as (and as the author mentions) you are supposed to turn off your cellphones in certain situations, and just as it's rude to text away with your phone when someone is talking to you, being distracted with your wearables will become a social no-no.
You can simply disregard those that don't follow whatever convention you think is appropriate, and policies do and will exist for all this scenarios.
The articles makes a valid argument on privacy concern as a result of this product. I think that the concerned entities will consult with Google to establish certain product restrictions. Obviously innovation can be put to good or bad use.
You can simply disregard those that don't follow whatever convention you think is appropriate, and policies do and will exist for all this scenarios.