If they made a smart watch that could do time/calendar, phone calls, text messages, emails, and turn-by-turn navigation - all without requiring tethering to a smartphone - I would buy one and probably not even have a smartphone.

I know I'm an anomaly, but I only use my phone to remain contactable and for GPS navigation until I get back to my desktop. A smartphone that didn't have to tether would suit me well, but there doesn't seem to be anything out there like that.