Madden NFL 18 will support both 4K and 1080p resolutions on the PlayStation 4 Pro at launch. Unfortunately, EA has no announcement at this time, regarding HDR support.
There was nothing specifically mentioned for the Xbox One S or Xbox One X at this time. Check out the official word GameSpot received from EA below.
“Madden NFL 18 supports PS4 Pro at launch in both 4K and 1080p, with no update needed. If a gamer chooses to run Madden NFL 18 in 4K, they will see improved resolution, if they choose to run the game in 1080p, they will see improved framerate in certain areas of the presentation. Core gameplay will render at 60fps regardless. We have no announcements to make regarding HDR support at this time.”