Which channels are listed as 4K?I have the Xi6 in my home and it is definitely 4K. They have currently 6 fulltime 4K channels on the service. Those channels are included in my current package, but unfortunately I don't have a 4K Tv, and have no plans to get one. The older Xi5 that is/was used by Comcast in some markets is not 4K capable. I think Comcast has just started to use the Xi6 in some locations.