Ian Jackson's general resolution to prevent init system coupling has failed to pass, the majority vote deciding that the resolution is unnecessary. This means that not only will Debian's default init be systemd, but packages will not be required to support other init systems. Presumably, this means that using other init systems on Debian (without using systemd as a base) will not be possible without major workarounds, or possibly at all. It also leaves the future of Debian projects such as kFreeBSD unclear, as systemd is linux specific.
The vote results can be found here
The winners are:
Option 4 "General Resolution is not required"
Yet ZFS has a license that is not compatible with GPL, yet that in no way stopped ZFSonLinux from producing a first-class file system (basically I mean not fuse). So nobody can bring it into a distro, but that doesn't stop a package from being available and any user can just add that package to his own linux installation.