Rumor: iOS 8 to come with improved iCloud integration
Apple is rumored to be bringing Preview and TextEdit from the Mac to iOS. These apps will allow users to view PDF documents, which are created on Mac and synced with Apple's cloud storage service. However, rumor has it that editing these documents won't be possible. Apple will most probably still encourage users to edit PDF files via iBooks or Pages.
These changes to iOS are a direct result of the close work between the developers of both iOS and OS X. Thus we might expect even greater integration between Apple's platforms.
It is also rumored that app developers will benefit from improved tools for the development of iCloud-based apps once iOS 8 gets released. It seems that the Cupertino company might have actually listened to the complaining developers, who claim that the process of creating such an app is quite cumbersome.
source: 9to5Mac via BGR