In App Search is very useful for users.So content apps should improve their search engine.
Apple music provide some features that Spotify have.But the better thing is,it offers artists' updating.All in one.
All OS connect to HomeKit.So it's very important to think about how to develop some apps to service for home.Such as this easy requirement:calculate the electric charge in house.
Apple Watch In App Logic,Include Voice.So we should think about more powerful features in Apple watch.Such as management or controlling other devices.It's more personal than iPhone.
Next iOS would be iOS 9,Swift would be version 2.So apps would update and launch more quickly.We should use more powerful tools to build apps.Include updating our programming language.Swift will be open source,so that it would be developed more and more faster.
Apple Map app would include transit and life service feature.Maybe it would be a new way to access O2O apps?
iPad would support multi display(or tasking) in the future.So media apps would get some benefits.
Finally,I suppose that Apple must improve their old apps and make them more and more interesting,powerful.So users would satisfy the iOS system.Also,Apple would make something big in big markets or revolute old markets.Such as HomeKit and Apple Music etc.
If you are making something the same like Apple doing,you should get rid of it.If you don't,you should pay more time to think about how to make your app more innovation.Or maybe the zone of your innovation is very small.If you are making something in a big market that Apple focus you can contribute more interesting things to Apple.Apple would give you more exposing.
If you want to make a start up,you should be the top and the best in market.If you are not,you are just doing business.