The thing I HATE about 4k is the extreme aspect ratio, or black lines. Often you will see a close-up of a girl's head on the extreme left of the frame then acres of negative space to the right (like the wallpaper or something). It's a problem with 16.9 anyway but just seems more annoying in 4k. I hate it when the shooter has to tilt his camera to get a full body shot. LOL Often you can only get someone's eyes in a close-up, etc etc. Awesome for home theater systems, of course.
I've yet to see a porn vid in 4k that blew me away and made me think the scene wouldn't have been just as good in HD or even SD. I don't need to count the zits on a pornstar's ass in stunning UHD.
