"The issue here is that for any eyewear to enable appealing use cases it needs to have lenses that are large, light, and aesthetic," said Aapo Markkanen, senior analyst, ABI Research.

"The display technology of those lenses needs to be more sophisticated than anything available today, and they will also need to support constant wireless connectivity for long periods of time. And all this needs to be delivered with a bearable battery life. It's a circle whose squaring will take longer than five years," added Markkanen.