Or will this be akin to how siri does a shit job understanding anything that is not mechanical in speech? Will be absolutely hilarious if it has a hard time recognizing non-light skinned hands for the gestures. Really hope they don't make that mistake.
Thankfully many of the people in the demo videos were people of colour, so I’m fairly confident Apple has gotten that bit right and hopefully their gesture detecting cameras have IR or dot-pattern emitters to work in the dark as well.
IR dot-patterns will be its own problem. And I hope you never want to curl up on that couch to watch a movie with a blanket. :D
That said, I am certainly not trying to say they definitely got it wrong. I share high hopes that this will work. Not enough that I will be an early adopter, though.
Speaking of which, notice how nobody who was relying on finger gestures (rather than a keyboard) was using menus, or doing anything mouse-like. Just scrolling and clicking.