W8 Gestures on WP8

I really love the gestures on W8 and i think gestures are more useful on Windows Phone i wonder why MS not added them to WP8.

I have a Omnia 7 and Wp8 is not exciting to make a switch instead i am leaning towards blackberry 10 because it has some gestures at least. I would really love the gestures on phone may be a 7" W8 RT tablet can stop me from blackberry switch.