J. Walter Thompson has developed a technology that will allow a person to determine which elf made the gift they received for Christmas.
Using the Santa Had Help mobile app, a person can scan a git's barcode, watch a video of the elf that made the particular gift and then, of course, share the whole thing on social media
Check it out here.
Maddeningly, at the time I write this I cannot find a single thing with a barcode on it (there's not much on that front in a Vegas hotel room) to share with what happens when your elf appears in a video. You will just have to let me know in comments.