Dog Tags

Newest idea seems to be a dog tag that has a USB connection on it…plug it in to a computer and it contains all you personal/health info for medical people responding if you’ve had an injury….  What I’d like to know is how can that help an ambulance attendant who is administering first aid at the scene?  Seems to me that if you are going to wear “dog tags” the traditional military type make more sense…with your name, blood type, allergies, etc., printed on the face of the tags…. Comments?