At WWDC we may see iOS 5, with a complete rework of the existing iOS notification system, as well as widgets.
It might be possible that there is coming new release of iOS and Mac OS Lion, but I think saying that there is coming a new iPhone and it will be named iPhone 4S is something unexpected.
But lets come back to the notification system. iOS 5 notification system should look then like a Cydia Tweak called LockInfo or Intelliscreen.
It will bring together Spotlight and your push notifications. You will also be able to but Widgets on your sites or in folders.
