Logging our lives with wearable technology
4 June 2013 Last updated at 11:22 BST
Imagine a day in your life - thousands of images of people and places, miles walked, driven, and cycled - all disappearing as the memories fade.
But what if you could capture, store, and then share your day? Well, now you can.
Rory Cellan-Jones reports on wearable technology for Newsnight.