I always loved the premise of the Chromebook: disposable device with a disposable OS; secure by default; your data is always backed up; if you have any doubts or problems you can always restore to the factory image and be back in action within minutes, etc.<p>I would love to see these principles implemented in a privacy-respecting manner: bring your own device, choose your identity provider (including self-hosted options that integrate with e.g. email or even plain old SSH), choose your storage backend (including other clouds but also e.g. Syncthing, SFTP...).<p>Immutable / secure-by-default OS would also be interesting, but nothing else out there is quite like ChromeOS. NixOS/Guix would be good candidates, but the underlying scaffolding is quite complex. Alpine & OpenBSD are both radically simpler, but lack the aspect of trivially reproducible builds. Then of course there's the question of providing a good UX on top of that base: I want to connect to Wifi, select the ID provider, type my username/password, and start working. That's an enormous gap to close.