Much like other modern filesystems such as ZFS and BTRFS it supports multiple filesystems in a shared storage space, snapshots, copy-on-write and also has encryption built-in as a first class feature including multiple keys and per-file keys.

There are many limitations in the developer beta so this is clearly still very much a work in progress. Getting these file-systems right is traditionally difficult and can take years (see ZFS, BTRFS) so it will be interesting to see how well it does.