Why Apple's iPad/iPhone/iPod does not have zoom function on video record?

I recently used a new iPad for my Kinect Demo recording, and the new iPad's video quality is quite good. However, the pain part is for video recording, there is no zoom function.

I checked iPhone4 and iPod4, they are in the same pool. My htc android phone does have this function, I don't think it is hard for Apple put it on, but why not?

 Anyway, I sent a email to Mr. Tim cook as follows:


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Hi Mr. Cook,

 Recently I used a new iPad for a video presentation recording, I even bought a iPad tripod mount for it. But I was astonished to find there is no video zoom function for the new iPad or iPad 2. Why????

Does Apple have any plan to add this function in the future?

 best regs,

 Henry

 Sent from my iPad


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So far no reply!