Observations on Technology Use by Dementia / Alzheimer's Patients

A recent personal experience has proven to me that there is an underserved market for people who develop dementia, Alzheimer's, and other related neurological disorders. These diseases can strike people in a broad range of ages and seemingly wipe out the ability to use more modern technologies. Someone who previously had the ability to use cell phones, computers, etc. can rapidly degrade to the point where extraneous buttons and touchscreens (for example) make a device overwhelming and completely useless. As we struggled with my mother-in-law this afternoon because she was overwhelmed by too many buttons on her cordless phone and TV remote, it seems to me that there is still room for simple devices that can assist a struggling user.

Does anyone have any similar experiences or thoughts on this subject?