Electron misses some core native application type features because they are not available to it. I can't see them coming to HTML5 either. It is just a colossal stuff up all round.
Seems to me that devs would only be smart (read: not in our favor or best interest) to go where the people are; what's the ChromeOS userbase compared to that of other OSes?
I don't care about ChromeOS, it's cross-platform, offline capable, secure and sandboxed applications I want. How much easier to distribute just the Chrome App engine to hundreds of varying Windows boxes, than the individual apps?