Mac:
- New desktops
- Wider support for external GPUs, VR (Apple already did their part with Metal2)
iOS:
- Unify hardware technologies:
---- bring Pencil, ProMotion displays to all new iPhones
---- bring FaceID, ForceTouch to all new iPads
- Better batteries
- iOS 12:
---- multiple user accounts
---- designed for OLED (e.g. display time, notifications when screen is locked)
- Xcode for iPad
WatchOS, tvOS:
- Less restrictive UI framework to allow for more engaging Apps
Definitely less restrictive framework, need to unleash developers creativity on those platforms