One of the things mentioned is that we will be able to curate and share our stream of conciousness online forever. In the past we've only had the writings of people to give us a look into their minds. The problem with data on the internet, however, is in practical terms it's rather ephemeral. I know we joke about, "You can't delete something from the internet" but as we've all know it costs money to keep something running and for many businesses it eventually becomes necessary to shut things down.
It's a minor quibble, admittedly, when thinking/dreaming of things like having a massive connected network that span multiple planets and who knows, we might live long enough to be able to curate our legacy as well. I really hope we develop some sort of ultra-long term storage technology. That way, even if civilization goes up in flames some aliens could unearth my collection of blog posts.