I don't even get much call for 1080p up here in the sticks, most gigs are 720p max...I'd be willing to bet there's a sizable percentage of the local population that doesn't even own an HD TV set.
Here in the non-sticks we have an HD tv but we don't have HD cable service because we don't want to pay extra for it. Just not worth it to us--better resolution isn't going to make the content any better. Still going to be mostly crap. It's hard to imagine 8K being worth it for anything less than theatre-size projection.