Last week we went thru a demonstration of gesture technology for kiosk for use by handicapped users. People unable to move their arms. People unable to speak.
People with ALS, Multiple Sclerosis, Spinal Cord Injury, Parkinsons, Cerebral Palsy and even some cases of Arthritis.
Furthermore, some people may not be able to use voice either, or even if they could, there may be noise or privacy concerns preventing use of voice.