If there is a movie which is only shot in 1080p and I have a 4k TV, it seems like there’s three options. One, watch it in the original 1080p with 3/4 of the screen as black border. Two, stretch the image, making it blurry. Three, upscale the image. If you give me the choice, I’m choosing 3 every time.
Sorry if it sounds crass, but I feel the process of shooting the movie is less important than the story it is trying to tell.