In the recent times, interacting with machines has become user-friendly. Moreover, the recent improvements in NUIs are making sure that machines can understand human gestures, touch, words, and thoughts in a much better way. Even so, designing for Natural Consumer Interfaces is quite challenging as designers have to keep below parameters in mind.

SOUNDS SCI-FI ALTHOUGH TIRING
Minority Report like office sounds really cool, but working with hands upward for a much longer period tire people. AJE should naturally and easily interact with the users without tiring them.

natural user cadre

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