For me smartphones are just good enough.
They all take nice pictures, they're all fast enough, they all have a nice screen, nice touch controls and nice UI.
It just doesn't matter as much anymore.
The only thing on here that made me go "oh cool" is the extra dim mode, my 4a really likes scorching my retinas at night.
a. A better quality of pictures even in less-than-perfectly lit scenes. This matters indoors or in the gloomier months of the year.
b. As you mentioned, an extra dim, or on the other hand extra bright, mode of the screen. Trying to orient yourself in blazing midday sun is a horror with some screens.
c. Fast charging is something I thoroughly enjoy.
Also, given that they have translation and live transcription of videos, live translation of videos was the next logical step. I hope it's available for all audio sources.
IMO, one of the recent updates brought nice feature to AOSP and therefore all vendors: navigation via swipes.
I wish google patched their devices for longer, I'd happilly only update every 5-6 years these days, but security doesn't allow for it.