The whole smartwatch "thing" doesn't do it for me. I have no desire to get one and no inclination to wear one.
Which, oddly enough, brings me back to authentication. A few months ago, I did a CBS Interactive webcast, "Mobile devices, wearables, and the future of identity" with Jonathan Bensen of Centrify (a company that specializes in identity management software).
In the webcast, Jonathan gave a demo of a second factor authentication app running on a smartwatch. I've embedded a video of that demo below, but the key idea is that instead of typing in a code, the authentication service sends you a message, it shows up on your watch, and you just tap it to get into whatever you're trying to log into.
Here. Watch it. It's only 47 seconds long. Then I'll come back to why this kind of thing could make even me want to run out and not only buy, but wear a smartwatch.