They need to incorporate their understanding of natural human functions such as communication, engine, cognitive, and perceptual skills with machine learning to make interfaces that talk with the person.

In the recent times, interacting with machines has become instinctive. Moreover, the recent advancements in NUIs are guaranteeing that machines can understand human gestures, touch, tone, and thoughts in a much better way. Nevertheless, designing for Natural End user Interfaces is quite challenging as designers have to keep below parameters in mind.

SOUNDS SCI-FI NEVERTHELESS TIRING
Minority Report like office sounds really cool, but working with hands upward for a for a longer time period tire people. USER INTERFACE should naturally and perfectly interact with the users without tiring them.

natural user cadre

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CAN'T AFFORD TO DISREGARD THE ACCESSIBILITY
Some motions might not be possible for users with afflictions. Therefore you can't do away with the support for assistive technology like Joysticks or electronic directed devices.