The timing of this for me personally is very interesting. I encountered and used one for the first time at IKEA yesterday. Their terminal was aimed specifically at customers' parking experiences, which makes me think they already know what kind of responses they're going to get.
That's interesting that they'd measure the parking lot experience. I wonder how they can change the parking lot experience to experiment with happiness levels. Route traffic differently through the different aisles? Provide shuttle services? Add distractions/things to read/music on the walk into the store?