
Mii Studio characters can be converted into a QR code that users can print or post on a website to share their Mii's. Friends then scan the QR with their 3DS camera to retrieve the Mii.
via IGN
image via Duck Fluff
At a dozen romantic locations in and around the town are three-dimensional barcodes which can be read by an iPhone. The barcode allows the love-struck visitors to have a computer generated photograph taken with their beloved through augmented reality technology. In the hotel, some beds have barcodes, so that photographing it reveals the virtual girlfriend lying there seductively.