Netflix adds 4K streaming for Comcast Xfinity X1 users

Now, Xfinity X1 users who have a 4K-capable device and a Netflix premium subscription can watch Netflix in 4K. Before the announcement, Netflix was already available for 4K streaming on most devices, including Apple TV, Amazon Fire TV, Chromecast Ultra, Roku, Sony TV, and more. – Shannon Liao, The Verge