Because your key is distributed to different devices protected by Guardians, they can help you recover your account. If you are ever locked out or need to move your wallet to a different device, you can ask your device holders to verify your identity.
With Gridlock, your recovery process is distributed, as well as your encryption key. This ensures the highest levels of effective security and a lack of a central authority to rely on. Your trusted Guardians are all you need to function, while Gridlock provides the secure framework.
Very soon, you will also have the option of Distributed Monitoring - a way of recognising suspicious activity which notifies your Guardians and asks for verification.