Kandao Obsidian is a professional 360 camera that can capture 6K 3D 360 video. A Kandao representative posted a sample from the Obsidian.
Here is the Facebook post, including the link to the files:
They also made a down-rezzed 4K version available for viewing on a Samsung Gear VR.
What do you think of the sample? Let me know in the comments! Thank you very much to Agnius Narkevičius for bringing this to my attention!