You are replying to a thread which is two years old, and a lot has changed in that time.
Samsung has since decided they no longer want to be in the business of selling and supporting smartthings branded devices. Not even the hub. So they are turning that over to partners. For the US and the EU it will be Aeotec. So you now have to look for these under that brand name.
Official announcement of the handoff:
Aeotec page showing the Zigbee Devices:
Initially it looks like these are identical to the previous smartthings branded devices, just with a different logo. And it looks like Amazon will carry them, along with some of the specialty home automation retailers.
Smartthings will continue to provide the cloud and the app.