The line "If you have a phone in your pocket, why wear this? And it doesn’t seem to replace the need to carry a phone." applies to both Glass and smart watches

The line "If you have a phone in your pocket, why wear this? And it doesn’t seem to replace the need to carry a phone." applies to both Glass and smart watches equally. Both are wearable screens augmenting your phone, though the Glass has additional features, like voice commands and a camera