For reasons that lie deep in the evolutionary history of the vertebrates, the right hemisphere deals with sensory input from the left-hand side of the body, and vice versa.
Finally, new in the latest software release is the option to condense the keyboard on either the right or left-hand side of the screen for one-handed text input -- a feature that's been extended to the phone dialer as well.
We've had a glimpse at Apple's conception of a sensor-based keyless layout, and the latest patent application from Cupertino shows the company looking to further refine the input experience -- this time using a camera and other sensors to detect hand position and overlay that hand position on a device's screen.
To solve these problems, it helps to have two instruments to hand: a carbon tax to discourage pollution directly, and subsidies or other incentives to encourage innovation around the cleaner input.