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.

ENGADGET: Apple patent application details method for detecting and displaying hand position on screen

It has developed a convoluted interface based on a wheel-and-spoke layout that we couldn't quite get the hang of at first glance.

FORBES: Magazine Article