Optik 4k question

[wireless]

Hello. Recently purchased a 4k tv and had the standard pvr and it couldnt run 1080p so i had it on 720p and the quality was decent so i am finally going to upgrade to a 4k pvr. Im curious, are all programs in 4k? If not then would the channel be 1080p?

More... (https://forum.telus.com/t5/Internet-TV-Home-Phone/Optik-4k-question/m-p/68302#M10554)