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 of voice, and thoughts in a much better way. On the other hand, designing for Natural Customer Interfaces is quite challenging as designers have to keep below parameters in mind.

SOUNDS SCI-FI YET TIRING
Minority Report like office sounds really cool, but working with hands upward for a much longer period tire people. URINARY INCONTINENCE 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 problems. Therefore you can't do away with the support for assistive technology like Joysticks or electronic directing devices.