A Vietnamese website has posted a video in which we see an iPhone in action with a number of functions that we don't know yet. The multitasking feature in this version of IOS seems to be updated.
The novelties in the OS on the video have stirred up some rumors that this is iOS 5, the new version of Apple's operating system, as we will see it on the iPhone 5. That's possible, but still uncertain. Its also possible that this is some homebrew feature created by some nerds, although it looks too nice at first sight.
Moreover, there are rumors that the iPhone in the video is the iPhone 5. The device differs little from the iPhone 4, except the white iPhone 4 never became available. It could be that the device in the video is a white iPhone 4. However, there were some rumors that iPhone 4 and iPhone 5 only differ internally, so this may be the iPhone 5 as well.
Source: Engadget.com