Comcast launches 4K app the same week it kills Xfinity 3D

If you need more convincing that 4K is the next big thing for HDTV and the push for 3D is toast, look no further than Comcast’s announcements this week. On Tuesday, Comcast shut down its Xfinity 3D channel first launched in 2011. The company followed-up on Thursday by getting into 4K with a small pilot