"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Apple to Release an 'iSight HD'?
One reader has found references to an unreleased High Definition USB iSight in Apple's QuickTime system files. The line is specifically labeled "Next Generation USB iSight" in QuickTime's localizable.strings and also carries a reference of 'iSight HD'. We're not sure how old this reference is, but a quick Google search shows no previous discussion of it. Still, it remains possible that this could be an old reference to a project that is no longer planned.
The iSight was an external Firewire webcam that Apple sold between 2003 and 2006. Apple stopped selling the stand-alone iSight in December of 2006. Apple has since integrated iSight cameras into their laptops and iMac, but their external displays remain camera-less.