An interesting concept from the least likely company. Ford’s “Key Free” concept uses your iPhone to unlock your computer. Just wait until both your iPhone AND Macbook both have NFC antennas built into them, and you can begin to see the extensive possibilities..
From Fastco Design:
Ford Keyfree is a Chrome extension that stores passwords for Facebook, Google, and Twitter. Then, whenever you’re near your Mac using a pre-approved smartphone, the app can “unlock” these sites automatically via Bluetooth. Your phone serves as your ID, thanks to the unique identifiers already in Bluetooth.