Resolutions that's lower than 4k on a 4k TV looks horrible, absolutely horrible on the TV, I had a 40 inch UHD TV that was defective before. It was only able to display 720p, not even normal HD, so that sucked and I returned it, if it looked unimaginably horrible on a 40 inch, how bad do you think it'll be on a 55+ inch? Also, 4k is more for games than movies right now since you won't notice a huge difference in picture quality of movies, but it'll be a lot more noticeable in games.