Any idea whether this will allow things like per-user high scores or per-user game settings? I remember Predator was talking this up in their design. It'd be awesome for each player to be able to have their own high scores on the game (or last 50 players or something), and to set it up so that if my kids scan, the game will go to extra easy or something (without having to always change the audits).
Also, if you're just scanning a QR code to ID yourself to the game, wouldn't that be easy enough to print out and have on a card or something if you didn't have a phone? Again, could be a way to set it up for the kids.