We'll all be elephants

We will never forget anything, even if we want to.

The storage requirement for a video stream and two audio streams, plus GPS location, is only about 10,000 Gb per year - which will cost about £10 by 2017.

With your phone converting all the speech it hears to text (and storing that, too, and indexing it by time and location it becomes possible to search it all - like having Google for your memory.

You don't ever need to forget a conversation again, even if all you can recall about it is that it was with a stranger you met in a given pub about two months ago and someone mentioned the word "fishhooks".

If you're a police officer, it means never forgetting a face and always logging all your interactions with the public.

If you're suffering from the early stages of dementia, or if you're simply over-worked and expected to keep track of too many tasks at the office, it means you've got a memory prosthesis to help you keep track of things.

And if you're a student, it means you can concentrate on understanding your lecturer, and worry about making notes later.

This technology is available now -- some researchers are using it - in a few years' time, it's going to be as cheap as owning a mobile phone, and a few years later it'll be just an extra feature of your mobile phone.