The first shows a user's hands on a traditional hardware keyboard projected in an on-screen representation (as background, Apple mentions the ergonomic strain of looking down to check your hand placement, so perhaps that's the thinking behind this one).

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

The placement of a hand or positioning of the groom contains assumptions about physicality and gender roles that often don't apply to same-sex couples or even nontraditional straight couples.

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It is radiating radio signals so it could interfere with the devices receiver, or some of the radio waves could be absorbed by other components and even more can be absorbed by the placement of a hand over the portion of the phone where the antennas are located.

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