This... And the recent Nest announcement, Iris closing up shop, etc.. All of these recent moves (and others) are going to eventually lead to consumer frustration and distrust. These major companies go through great lengths to position their brands as being perceived to be trusted and reliable, yet at every turn, deliberately take actions to the contrary.
While I tend to think most consumers are too naive or complacent to understand this, it doesn't take a genius to know that he's been screwed if his expensive thermostat stops working with his Echo, all because the corporate master behind the thermostat wanted to.
SmartThings as we know it has already been killed off, Samsung just isn't saying that officially, but all of their actions support that. I fully expect that over the next 6-18 months the groovy platform will be shut down. I also expect that Samsung will close access to the new API eventually and start charging developers to access it. I would also not be surprised to see the SmartThings community shut down once these change happen either.
I'm very glad I got out when I did!