Steven Aquino on Twitter:

One cool tidbit about Voice Control: It uses the TrueDepth camera on iOS/iPadOS to tell if you’re looking at the computer. If someone walks over and you turn your head, Voice Control will stop listening until you go back to your computer.

I think Voice Control is the thing I got most excited about watching the WWDC 2019 presentation a couple weeks ago. I am able to use my Mac without such features, but it looks so cool that I can’t help but want to use it.

Mr Aquino’s point helps illustrate that a lot of work – and thought – went into making the feature. So much so that calling it a ‘feature’ almost trivialises it.