the color of the margin should be the same as the background color of the content
This after insisting on a sufficient inactive margin, and going on to say the technology doesn't exist. The thought ends with the conclusion of a one-inch-ish black margin.
But wait: what if a tablet DID run its display area to the edge? just with the understanding among developers that any user activity within a specified margin would be ignored, either for lack of sensors or programed disuse. Bingo: Apple's odd requirements of no margin (per se) and no black is satisfied and surpassed by a superior user experience of relevant, dynamic borders; anything from automatic color matching to extending a background image to the edges or even putting useful dynamic information & imagery in the margin may/would be preferred to a space-occupying dead black zone. ...then Samsung patents the idea, leaving Apple with, well, a dead black space-occupying margin.
Methinks the term "malicious obedience" applies. Careful what you ask for...