It would be really nice if they have a notification tray (or rather a summary area). That would make it the best notification system on any current platform. Right now, once you swipe the notifications away, there's no single place to go and view those notifications. I can't recall if it still keeps a small reminder icon on the bottom.

Ideally, swipe left to dismiss, swipe right to dismiss for now (still listed in the notification "tray").