We actually have a piece in my work's showroom that recognizes whether you or female or male and displays stuff that would interest you based on that singular data point. Right now if you are a girl it displays a bunch of awesome shoes and handbags. If you are male it displays jackets and shoes. Its surprisingly accurate.

My company sells exclusively for marketing/advertising purposes.

While our prototype is a bit of a mess (we bought the whole unit - hardware and software and the software is all in Korean so we've had a hard time changing things like UI) I can say that it is one of the things that people always have fun with when they come to meetings here.

The only problem with actually selling it is that Shopper Marketing / Point of Sale doesn't currently have the biggest budget for pieces like this. It's a very niche market and reduced further by the fact that a brand sells their brand in retail stores where they don't have as much control over the actual environment. Putting a big display like this in a store that is not operated and maintained by the brand is tough to do. The stores themselves (Macys, Neiman Marcus, etc) rarely have the marketing balls or budget to do something wide spread and collaborate with brands. It's hard to get everyone together to make a big purchase that would span across numerous stores.

The most successful piece that we've sold for shopper marketing was a collaboration between Playtex and Babies r Us. Babies r Us wanted unified interactive devices the educated customers on the huge amount of baby bottles out there. What we did was build lighted boxes that called out features when people pressed a button for 5 different brands (playtex, tommee tippee, babies r us branded bottles, etc) and those were then sold to Babies r Us and placed in all their retail stores. It was pretty cool. You can see some photos here.