You need to build on existing ideas in order to do things different and to change. For example, Apple could not have created the iphone were they not allowed t

You need to build on existing ideas in order to do things different and to change. For example, Apple could not have created the iphone were they not allowed to use multitouch gestures. Or HTML rendering. Or batteries. Or email. Or music playback. Or networking. Or touch screens. Or app stores. They could also not have improved on iOS without taking existing ideas from the Android ecosystem, like Notifications, cloud storage, on the air upgrades, location based reminders, lock screen widgets, turn by turn navigation, mutlitasking UI, voice search etc.