Tribblix is an operating system derived from OpenSolaris, OpenIndiana, and Illumos, with a retro style and modern components.
NEWS: December 9th 2014: Milestone 13 released, plenty of updates, and fixes 5421. See changes.
It's proved that the concept can work, and while it certainly isn't fully functional, complete, or yet suitable for production use, it's getting closer. You can download the image, install to a hard drive, and use it.