A WebmasterWorld thread has discussion around a new look for answers around medical or health related queries in Google.
The results, as described by a webmaster, "replaces results with content," which is what the knowledge graph does. But he goes on to explain that the "content from our sites is placed directly on Google I feel that this will have a huge negative impact in terms of how much actual traffic Google will send to our sites."
Here is a screen shot of what he means:
At least in this case, they are linking to the results. It won't be long until Google removes those links and just places it in their knowledge graph.
Of course, this pushes down the results and you won't even see results on most screens.
I doubt any of you are surprised with this, outside of the fact that Google is actually linking to the source here.
Forum discussion at WebmasterWorld.