The mystery developer contacted 9to5Mac with some details of the camera-based gift card redemption feature in iTunes 11:
Now, what nobody knows yet is that this feature is accessible by visually impaired or blind people. VoiceOver helps positioning the card in front of the camera and the very fast image processing algorithm generates very quickly the result. The user experience is amazing.
Accessibility is such an important component that goes overlooked frequently. I’m just as guilty of this — I often forget to add
alt text to images, or
<div>s. Apple is setting the bar high on this front. I just tried redeeming an expired gift card with VoiceOver on and it worked incredibly well.