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"If more capital is to move onto Lightning, users must be able to restore their node or wallet in a way that is familiar to them - like entering a series of 12 or 24 words into an application. Service providers allow users to store an encrypted backup of their Lightning wallet in the cloud. In the event that a user’s device breaks or is otherwise compromised, the encrypted cloud backup could be easily imported to a new device."
That's already implemented in Breez wallet. Really easy to restore Breez node & wallet on a new device - just enter 12 words and it's done.
Additionally, NFC as another way of making payments - is a must.