Now that a few days have passed we now have the first few samples of what the Galaxy Note 9 is capable of in 960fps slow-motion mode. It shows about the same effective resolution as the Galaxy S9 and S9+ which share the same camera system. The Note 9 is supposed to increase the dynamic range but it is unclear how much benefit it will show in a resolution starved 720p high-speed mode.
The best selling factor for the Note 9 as a slow-motion device is the doubling of recording time to 0.4 seconds from the 0.2sec available on the Galaxy S9. This transforms into a 12.8-second video played back at NTSC 30p which makes it much more enjoyable than the 6.4 sec on the other Samsung phone.