I was wondering how you feel about the idea of taking advantage of the fact that your frontend can run in any browser, in maybe considering a "remote gui in the browser of your choice on any LAN client" kind of thing.

The processor itself could be headless (not sure how Elementary is implemented, I see you mention node.js, just having an immediate reaction, maybe it already is gui-host-agnostic network-aware in that sense, by default, open a port to the lan, etc)