The first point made in this article is critically important for Google and other developers of "smart glasses". If the device doesn't actually do something a handheld can't do, consumers don't need it. The prospect of putting a handheld on someone's wrist or face so they can walk around talking to the device and pushing buttons on it is not innovative. It's iterative. And pointless.
Three Reasons Not to Buy a Samsung Smart Watch
"I have no interest in the Gear. Here's why."