It wasn’t touted onstage, but a new iOS 8 feature is set to cause havoc for location trackers, and score a major win for privacy. As spotted by Frederic Jacobs, the changes have to do with the MAC address used to identify devices within networks. When iOS 8 devices look for a connection, they randomize that address, effectively disguising any trace of the real device until it decides to connect to a network.
—Russell Brandom, The Verge