An "Easy Unlock" feature has been discovered for the Chrome OS that would allow users to login to their Chromebooks simply by having a registered phone nearby. The feature is currently found on the Chrome OS dev channel and has no functionality other than a graphical interface. Users will be able to find their phone and register with the OS to ease the login process. As an owner of a Chromebook I am very intrigued by this feature and would definitely like to see it included at some point in the future.
Source: Android Police