It's an open question if this will go anywhere, but one OS is being written in Rust from the ground-up - https://www.redox-os.org/ https://www.redox-os.org/ I'

It's an open question if this will go anywhere, but one OS is being written in Rust from the ground-up - https://www.redox-os.org/ https://www.redox-os.org/ I'm pretty impressed by the progress the project has already made. If I had a bit more time I'd love to contribute!