3D Touch enables varying degrees of pressure input on the display to have different effects in software. What's new in iOS 11 is a greater use of touch and hold, which enables varying degrees of time input to have different effects in software. To a limited extent it mimics 3D Touch but it is not, 3D Touch. 3D Touch is much faster as the pressure can be varied over very small time scales and it also allows for more fine grained control, such as the peek and pop effect.
Edit: Used the term "Touch ID instead of 3D Touch" (thanks ern99)
Edit: Used the term "Touch ID instead of 3D Touch" (thanks ern99)
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