[gus_massa]

> But with perfect recall,

This assume an infinite hard disk (or at least big enough). And even in that case, some info can be simplified to get faster access, and keep the details in a cold storage.

[gsanghera]

What I meant was - the ability to revisit the past perfectly, rather than a "dimmer" version of it.

[gus_massa]

To revisit the past perfectly, you need a huge hard disk.

Video uses about 1GB/hour, that's almost 9TB/year. And now add something like 360° video, or a quality, or more fps. And now add all the other senses. To revisit the past perfectly, you need a huge hard disk.