Smartphones are mobile. Glasses with a keyboard would require either being fixed to a keyboard location or a keyboard with the form factor of a smartphone, and if that’s the case why do you need the glasses?
int_19h
The idea is that you'd use smart glasses without keyboard most of the time, mostly in the same scenarios you'd use a smartphone today. But unlike a smartphone, smart glasses can also replace a laptop if and when needed by pairing with a keyboard.