Marketing, Human Nature & Touch(pad)
Have you noticed how more and more technology is "hands-on?" Touch screens are everywhere- on phones, ATMS, airport terminals- all kinds of computers. When Apple brought out the iPad, I didn't think it met a felt need. But I was only thinking about what what it did, not how it did it. I believe the iPad has caught fire because, like its smaller predecessor (the iTouch), how it works is with pointing, touching, swiping - natural intuitive human movements.
The more that interfacing with products and services uses our natural human gestures, movements, and patterns, the better they will sell. Why: They just make sense to us as human beings.
Let's apply this thinking to more complex things- like medical devices and electronic medical records EMRs. The more complex the issue or problem is, the more intuitively simple the interface with the solution needs to be. In our customer research on a wide range of medical products and health issues, we hear it all the time. Keep it simple. And nothing keeps it simpler than products designed to have people to do what they naturally do anyway.