(heard on NPR, but their link isn't up yet.)
So.. you no longer have the right to remain silent. You have to identify yourself to the officer, if they're seeking information in an investigation.
"Justices had been asked to rule that forcing someone to give police their name violated a person's Fourth Amendment protection from unreasonable searches and the Fifth Amendment right against self-incrimination."
And what was that about showing ID to the MTA? Maybe they can force you to, after all...