This is nothing new, or exciting. Most Linux distros will do this either via PXE, with NFS root, or rsync a rootfs to RAM and then boot, etc etc etc. There are literally so many ways of doing this, it would take me eons to stop the creativity kill.
What do so something cool? Boot a whole computer cluster using BitTorrent as a backend, diskless, diskfull, at lightning speeds: https://github.com/dchirikov/luna
What do so something cool? Boot a whole computer cluster using BitTorrent as a backend, diskless, diskfull, at lightning speeds: https://github.com/dchirikov/luna