With more advanced features Tim Cook promised to provide a very significant change in the latest iOS, those changes will be tasteless course in the Macbook that will be present in the future because that will definitely be using the iOS 8. But iOS 8 is not available for the Macbook only, but also for mobile like the iPhone and iPad.
For mobile devices that have been released but would like to try the sophistication of IOS 8 can still upgrade it, but not all of them can, here I will give a list of which can be upgraded from IOS to IOS 7 8.
The gadget can list on upgrade to iOS 8
iPhone iPad / iPod
iPhone 4s iPod touch 5th generation
iPhone 5 iPad 2
iPhone5c iPad Retina Display
Air iPad iPhone 5s
iPad Mini
Mini iPad Retina Display
Fitu new features offered in iOS 8 are:
Handoff: The feature you are able to receive and send short messages or telephone calls from the Apple Mac computer. I know that this is the first time in the world of a computer can make phone calls and receive text messages.
AirDrop: with this feature you can transfer files from iPhone or iPad into a Mac computer.
For developers, Phaik Apple also provides a new programming language that is "Dubbed Swift", so the developers can develop applications that are compatible for iOS 8.
For developers, beta 8 iOS already available, but for the user or users plan will be able to use the iOS in next september.
Similarly info from Apple, may be useful.