- API to run some form of background task as needed - Revamp notification, maybe notification centre - API to change home screen icon. - API for NFC as it is rumored to be in iPhone 5 hardware - Spotlight API for app content searchable under spotlight - AirPlay 2 - api to push screen to AppleTV and convert iphone/ipad as controller, make it easy to support this functionality in games - API for social liking and following, Apple'own social networking build into iOS 5 and Lion - Apple Messages/Chat, telco independent sms?