Default [Q] about smart motion features in note 2 after upgrading to 4.3

hello everyone,
i upgraded my note 2 to android 4.3 2 days ago. i was totally disappointed beacuse there was no smart motion features like air gesture, smart pause, smart scroll, air command. may i know why?

please send me the answer to this mail

also tell me where to buy a very good case for note 2