Oh, I think we're all well aware of security options like this. I've worked in NOCs as well and had to use one to log into any of my accounts.

Blizzard was, however, the first MMO company that I'm aware of to use the keychain authenticators for customers with game accounts. As such, they get the credit for starting it as an option for players within the genre. If another MMO company did it first for customer's accounts, then I'd agree with you.