iOS:
- PIP
- spit screen Multitasking
- astrophotography
- picture profiles (standard, natural, vivid) and ability to set noise reduction: pictures are currently way too saturated, aggressively de-noised, and over-sharpened, for my tastes.
iPadOS, one important feature plus a lot of refinement
- Time Machine
- Polished multitasking
- Better mouse support (option to set scrolling direction and speed, traditional cursor shape, gestures support for apple devices)
- better keyboard support (including APIs for game developers, shortcuts to enter/exit slide over/split screen