I understand that tech people 'expect' consumers to get accustomed to bulky glasses but those of us who wear glasses long-term are very aware of the inherent discomfort. This is why very light-weight glasses become increasingly popular.
I am sure many HOH people would use glasses with a speech-to-text function, just as I'm sure we will eventually get one. Or wifi communication text appearing on glasses.
BUT I personally could not use such a device because my vision is also somewhat impaired. Another alternative that would not require glasses would be a simple electronic strap worn in a place comfortable to the individual user. that strap could create a mild vibration in the direction of the sound source. I think it would be less expensive and the adaptability would mean a paralyzed person 
applause could wear it where their sensation was best. As a quad I'd put one around my neck and make it stylish with fabric covers to match my outfit. Someone else could wear it around their belt line. That is my 2 cents.
