Specifically it seems like a better version of bittorrent. It seems to be more resilient that bittorrent, better able to do updates than bittorrent (they apparently promise to have live updates by multiple writers, implying one could host for example a live database in a dat URL), better able to find optimal peers than bittorrent, better security around discovery, a flexible datamodel (e.g. the data being shared does not have to be files and folders, where as bittorrent would require wrapping that in a file, this can allow the transparency through the protocol layer)
"Think WAN, act LAN"
or is it
"Think Wan, net LAN"?
I don't know.
You'd just create a dat feed for it and share that address in the thread. You can do that directly from Beaker Browser easily.
If everyone on the thread was getting it, you might only have to upload slightly more than 1Gb data, as all the chunks could be shared between the other people.
Same as bittorrent, but even better because you can easily add more files to the feed later.
So it's wasteful and can't represent reality well. So it's quite limited to how far we can use it as a whole species.
It's less the Amazon of algorithms and more the Myspace. In 15 years it will still have some impact in the abstract sense of how it influenced technology, but blockchain itself is unlikely to still be there.