We have ploughed through the iTunes movies catalog so you don't have to. Here's a list of all the 4K HDR (& Dolby Vision) and Dolby Atmos titles that we have found. You need the Apple TV 4K and of course a 4K HDR TV to enjoy all of this.
We'll keep the list updated. Are we missing some titles? Please share your findings in the comments section.
You can sort the list by pressing the headers or filter the list by typing text into the text fields.