The thin glowing bricks are smartphones -- you can use them to call other people, send them text messages, play games, look up information, all sorts of things. One of them might be useful social camouflage, but don't just steal one... the same technology that gives you up-to-date maps of wherever you are can also track a stolen phone.

And Pokemon isn't a threat, it's a game. The name's an abbreviation of Pocket Monsters, and you collect those monsters, train them, and make them fight other people's Pokemon. I don't know more than that, really... I missed out on Pokemon Fever or whatever the hell they called it.

Oh, and they're not literal monsters. They only exist in the game.