The Galaxy Note 8 by Samsung is having a lot of interest pull these days. However, all of the camera improvement info leaks point to the same Slow Motion performance as the regular S8 which means it will have 240fps 720p but only up to 60p 1080p recording. 4k capped at 30fps as well. Below is the teaser video from Samsung:
https://www.youtube.com/watch?v=dIJ45mImgqc