Size, battery and price are huge problems. No one wants to be seen in public with that thing, only use it for 2 hours and pay 3 months worth of salary for it.

Size, battery and price are huge problems. No one wants to be seen in public with that thing, only use it for 2 hours and pay 3 months worth of salary for it. Show me something on my eye glasses, let me charge them overnight, charge me $700 and you bet I'll be using them daily. Just look at the unlikely success of the Apple Watch. Nobody really needs it but it's practical, it replaces a piece of wear that people already used, and it does not cost a fortune. Tech just is not there yet for glasses.