According to the genius folks at 9to5mac claims that Apple is working on a new gesture based lock for iOS and the new gesture based lock will look like Android gesture based lock. This new type of lock is already being tested internally.
In this gesture based lock user have to chose pattern on screen and than put in the pattern to unlock the screen, The new lock screen system is the same as the one Google Android uses. This there is no Official comment by Apple on this that they really going to kick this feature in the next update of iOS or in new version of iOS 5
Here are some more screenshots: