It seems that the "natural" feature is not very popular:
http://www.tuaw.com/2011/07/21/poll-lions-natural-scrolling-vs-reverse-scrolling/
What does it mean if almost 50% of users consider the "natural" way not to be the most intuitive way?
"Natural" might be intuitive on a touch screen display. However, using navigation devices such as a mouse or a touchpad our brain still needs to project the action of the navigational device to a visual reaction on the screen. Hence, popularity of "natural" is a question of imagination not of intuition.
This leaves the question out: when will Apple come up with Mac Books and iMacs exhibiting screen touch features? - Probably soon.
