AFAIK you need to be actively looking at the screen and touch the screen for it to unlock. Simply glancing at the phone sitting on your desk will not cause it

AFAIK you need to be actively looking at the screen and touch the screen for it to unlock. Simply glancing at the phone sitting on your desk will not cause it to unlock, as far as I can tell. There's speculation that the demo failure was because they had staff clean/handle the devices before the demo - i.e., they both looked at the device and touched the screen. Of course, lots of uncertainty around this particular botched demo.