Use case: We drive to a supermarket. Sweetie goes to buy groceries, I go next door to buy some, ah, "boutique" beer. I finish up, put the beer in the car, start going into the supermarket. I speak into the phone "What aisle are you in?" A few seconds later I see her reply on my watch. Neither of us had to pull out our phone and thumb out a txt msg.

Use case: I've just finished my homeward commute. It's dark and cold, my hand are encased in winter cycling gloves. I pull into the front yard, dismount, turn off my battery lights. My house key is somewhere at the bottom of my handlebar bag. I could pull the bike up onto the little porch and ring the doorbell but instead I press a button on the watch and speak "Sweetie's home", then press Okay. By the time I've lifted the bike to the porch she has the door open. Marvelous!

Sometimes new technology really is all it's cracked up to be.