So, to sum up: First there was Nvidia Gamestream, which was proprietary and later deprecated by Nvidia themselves. Then came Sunshine and Moonlight, open source server and client implementations of the protocol to allow low latency streaming for all platforms. Along the way the Game on Whales project started, to allow multi seat streaming plus virtual displays so currently logged in user sessions aren't impacted. Bas…
Nothing seems to do exactly that, though this (moonshine) seems like it might be the closest yet.
Can it run a desktop environment as the "Application" that it's streaming?