iOS 7 was announced yesterday to great adulation as Apple announced the biggest user interface overall to the software since the original iPhone OS, but many are still wondering what features of the OS will trickle down to their device. For starters the thing to take into consideration is that only devices after the iPhone 4 will be getting the update, so if you own the iPhone 3GS and the original iPad or the iPad 2 then you are out of luck. Also Read - Apple CEO Tim Cook claims iOS is more secure than Android
iPhone 4: While it gets the update, it will only get the photo filters, new photos app, and the new camera app. That said, the Panorama feature will not be enabled.
iPhone 4S: iPhone 4S users will get more features than iPhone 4. For starters the camera app will be fully functional and the Panorama mode will be enabled. Siri was originally introduced on the iPhone 4S and the service will be available via the update. The new photos app will be available with the camera filters.
iPad third generation: The iPad 3 will receive the new camera app will be available on the iPad 3 but minus the Panorama mode. It will also get the new Photos app with filters and there will be no Siri support.
iPhone 5: The iPhone 5 will receive all the new features of iOS 7. This means users will gets access to the new camera app, the new Photos app with camera filters, the Siri service, and AirDrop file sharing.
iPad mini: The iPad mini will receive all the same features as the third generation iPad but will also get AirDrop file sharing. This means features like the new camera app, and Photos app with filters will be available.
iPad fourth generation: The fourth generation iPad gets all the same features as the iPad mini. So features like AirDrop, a new camera app and Photos app with filters will be available to users.
Other than this all iOS 7 devices will get the new Safari browser, the new Calendar app and the new Music player.
Update: In addition to this the iPad 2 will also get iOS 7, but without the extra features that have been mentioned above, only the new UI, the Calendar app, Safari and the new Music player will be added.