QR codes are cool. They are free. They are used inside museums, on soda bottles or in the movie posters.

But, to this day, I haven't seen them much in games... well, not in desktop games.

As most of current PCs/Macs have webcams, they could be easily used as an expansion to the gaming.

A collectible card game with QRs on them?

Cashier simulator?

I don't know, I am not the jamer here. You are.

Desktop games are preferred.