Very good issue.
I still wonder about the end game for wearable technology.
I can see quick access for user required information, area alerts, emergency directions and declaring a personal need for help.
Some of the other ideas need more discussion and definition. Specifically what do you want to put on people/animals, what type of data do you want to send or collect, and what are you going to use all of that data for?
Lots of unanswered questions.
Great issue. There was something relevant and of interest on virtually every page!