Idea is good to collect feedback but mapping it on the timeline to make it relevant is difficult. If the offering is placed at different points in a supermarket (for example), a direct feedback for products can be obtained. Use cases are many but again - how many takers are there?

Nice concept for getting feedback post discussion

* Using Microsoft Cognitive API to measure the reaction of people using a webcam. * Not sure who the target market is. The technology works but what's the niche?