iPod Touch 4G allows emergency video calls

It seems that Apple has introduced a new feature in the iPod Touch 4G that is probably meant to function as a "panic button" in case the user is in danger. It is about the possibility of making video calls when the terminal is locked with a security code. Of course, the explanation given by me above probably has nothing to do with the real reason why Apple introduced this function, however it is interesting to see if it will exist in the new iPod Touch 4G or if it is just an error by those who made the graphics for Apple website.

What do you think, what is the use of this function?