The SmartThings app has been released for the Samsung Gear S smartwatch at CES 2015. By using the the SmartThings 1.0 app you are able to activate Hello, Home actions by either tapping the screen, or through voice recognition. You can use the preset phrases or setup your own custom ones. It is also possible to change your location via the app as well.
You’ll need the Android SmartThings app and an active account with a working Hub and location to run the Galaxy Gear app.
Here is a demo of its voice recognition by SmartThings CEO, Alex Hawkinson: