Try this: Step into view and let the system detect you as a new, unique viewer. Walk out of the frame and then come back – notice how the viewer count does not increase twice, thanks to face-based re-identification. Now look at the product for a while, glance around, maybe talk to someone next to you: your attention time and emotional reactions are still tracked as long as you’re present. Try a few different expressions over several seconds and watch how the six emotion categories fill up and rebalance in real time.