It's peer-to-peer instead of client-server, so it doesn't require you to run an OwnCloud server somewhere. It syncs content directly between devices. Sounds like it would be great for real-time backup to another computer/NAS in your house, or sharing picture/video content with family members etc.
Particularly as data sets grow beyond what's reasonable to backup with portable disks and tape, being able to keep live clones in two places is increasingly important, yet kind of a holy grail. This is a very promising approach.
