A Guys named “Andreas” made this very realistic Notification Concept demo video. It looks mind blowing, and very realistic and probably coming in iOS 5.0
There is huge buzz that Apple will improve their Notification system a lot in next iOS major update 5.0 . This video will just make you more interested about iOS 5.0.
Lets hope Apple already has better plan then this or they have also seen it and got inspired from it.