The 4000mAh battery will be well worth getting, as that is massive and should get a good amount of battery life.
Also like the idea of 1TB storage (512GB onboard + 512GB memory card) - that is more than what many laptops come with now they have switched to the inferior SSD storage.
I'm secretly hoping that Samsung have crammed a bigger antenna into the bigger frame of the Note, to hopefully improve signal strength too - as there have been many a time whereby mobile strength is weak and Samsung generally don't have spectacular antennas. This is certainly the case with Wi-Fi on the Galaxy S7 Edge being weak and the Galaxy S4 dropping to 2G all the time.
Also really expensive for the Note 9 (especially the 512GB model) - but hey, better than Apple and their £1000 iPhone X that has no headphone jack and no fingerprint reader.