I received a response from BlackBerry team regarding this issue, this is still not supported on the Simulator:
"For BlackBerry 10 the user would see their notifications in the BlackBerry Hub area. So they would be able to take action on the notification or delete it etc. Unfortunately you won't be able to see that just yet within the simulator. But if you are seeing the notification splat on the app icon, the notification would show in the BlackBerry Hub correctly."