Hi,
It wasn't a question of using Kodi or LE for our project, but I envisioned something in the same spirit as the LE box running behind me while I write these lines: you copy an image to the HD/SSD, and it boots on the full-screen app. In a couple of seconds, the application is "ready to use". The user doesn't have to bother with, or even be aware of, the underlying OS — there are no system pop-ups, background application notifications, or disruptive messages that currently plague the prototype running on a Windows box, despite a "heavily customized" Windows Registry.
I must mention that I am a Linux guy, hence my natural inclination. Building a customized kernel was something I did on a regular basis a few years ago, so I am not afraid of that part, if the drivers exist, of course.
Anyway, thanks a lot for your detailed answer. It brings up many areas to investigate further for our project.
Regards,
-- Sylvain