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Now that we have a double tap gesture on the 6's home button, what are the odds Apple intends to extend the home button's touch functionality? Maybe make the button a tiny bit bigger, and you could conceivably use it for gaming, scrolling, dismissing notifications on the lock screen, etc.
I think it will be a cool way to lock rotation on ipads if they are getting rid of the physical switch but for the rest of it I doubt it.
 
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