Activating Force Touch on the iPhone 6s will also be indicated by a different interface than on the Apple Watch, according to 9to5Mac. Subtle integrations don't require an additional interface, but certain Force Touch gestures will launch an interface surrounding your pressed finger or as a list of shortcuts at the bottom of the screen.
Lastly, 9to5Mac's source claims that haptic feedback for Force Touch on the iPhone 6s will feel "nice." Apple is expected to announce its 6s and 6s Plus models during an event on September 9, although the exact date is unconfirmed as of this writing.
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