Plan B (built on top of Plan 9) and Octopus (built on top of Inferno) were closer to that - Plan 9 and Inferno had the fundamental operators but not the environ

Plan B (built on top of Plan 9) and Octopus (built on top of Inferno) were closer to that - Plan 9 and Inferno had the fundamental operators but not the environment to exploit something like that, whereas Plan B/Octopus had interesting idea of "Personal Mainframe" which centralised a single person's computing experience, while making the peripherals composable. This meant for example that you could have your "personal mainframe" in your office, then go with your "laptop terminal" to a conference hall, and when it came to your presentation instead of attaching the laptop to a display, a room-local computer could be used for its resources like screen and audio. All the while you have continuity because applications stored the state on your "mainframe"