It seems the entire internet was taken for a ride to rumorville with the supposed spec leak of 1000fps slow motion on the Galaxy S8. The final phone is not only not including the spec but it is still lower when it comes to higher frame rates than the iPhone 6s, 7, Google Pixel and Xperia XZs and XZ Premium. The phone maxes out at 720p 240fps which is so 2014 when it comes to high speed.
When it comes to 4k the rumors also touted 4k at 60fps, even some sites out there still list the phone as a UHD 60fps capable handset. It is only in the end a 4k UHD 30fps phone with 1080p 60fps and 720p 240fps. The Galaxy S8 does look like a beautiful and extremely capable phone with an impressive screen and voice features.
