My notes on the upgrade from 14 to 15 I took during the announcement:
* Twice as bright screen
* Dynamic Island
* Smaller bezel
* Contoured edge
* New better plastic back
* Big camera improvements
- 48MP main camera vs. 24MP
- Faster focus
- Much better telephoto
- Improved portrait mode
* Better color
* Better low-light performance
* No shutter lag
* Turn on portrait mode after the fact
- Smart HDR for better lighting
* Live voicemail transcription
* Longer battery life?
* Satellite emergency / roadside assistance
