Why the "novel" qualifier? There exist many OSes (and UI designs) based on non-mainstream concepts. Many abandoned, forgotten, @ design time suitable hardware

Why the "novel" qualifier? There exist many OSes (and UI designs) based on non-mainstream concepts. Many abandoned, forgotten, @ design time suitable hardware didn't exist, no software to take advantage of it, etc etc. A 'simple' retry at achieving such alternate vision could be very successful today due to changed environment, audience, or available hardware.