How far away is Comcast to actually adding any Linear 4K channels?
I have been waiting since Dec. 2015.
For either "over the air" or live linear cable; companies are not spending the capital investment needed to make it happen. It's hard to do in the current political climate. Broadband Internet is basicly it for now.
That new show Masked Singer is in 4K! But what I have discovered is that if you watch a 4k show ondemand and not when it actually airs, it will be in 4k but not full UHD.