This thread... Holy cow do people not understand what they're talking about. Nor how to read specs on Apple's own website, apparently. It says right on their spec page that the 2016 MacBook Pros can only display Millions (8-bit) not Billions (10-bit) of colors.
If you're disappointed now, I'll tell you why you'll be disappointed next year: Next year's Macs using Kaby Lake processors will not support hardware accelerated playback of the AV1 video codec, which Google and others are pushing as the standard video codec for UHD Premium content over the less efficient and royalty-fee ridden h.265. Blame Intel, the video standards bodies, ISPs, and HDMI group for getting us in this mess.
They can happily outut 10bit colour to an external display.
But this has nothing to do with video standards obviously. 4K HDR etc on consumer video devices is the Wild West at this point.