Systemd adding ability to boot directly into a disk image downloaded via HTTP (phoronix.com)

I've yet to setup/figure out how to boot a Linux installer/live CD/ISO via pxe, so when I want to setup a new machine, I could just grab an ethernet cable and power on, instead of fumbling with a DVD or USB drive. It would be awesome if I could select which distro to boot. This feels like a step closer to that.