What killed it was that it didn't solve any problems that weren't already solved by other devices (notably Smartphones) and introduced other problems (the 'glas

What killed it was that it didn't solve any problems that weren't already solved by other devices (notably Smartphones) and introduced other problems (the 'glasshole' one you mentioned is but one example) that the other devices did not have. That and of course Robert Scoble wearing it in the shower.