I used to run separate Emacs instances on both Windows and Linux, but these days I settled for a different workflow. I keep my main Emacs running on my home Linux desktop. From other computers and locations, I just SSH to the desktop and run an Emacs frame in terminal mode (the command is just: emacsclient -t). Turns out, this is usable for about 95% of things I use Emacs for (the remaining 5% are when I need to view a picture or a PDF, which obviously won't show in terminal). Hell, if you configure your terminal/SSH client to run in 256-color mode, the resulting terminal Emacs will be nearly indistinguishable from the GUI one!

That's one of many hidden strengths of Emacs-based workflow - it works the same whether you're running in GUI mode, or connecting remotely with text terminal. That also means I can work on heavy projects from my underpowered 2-in-1 netbook :).

I have done this before but I like going one step further and running Emacs over X with xpra or similar. An annoyance with xpra in particular last I looked into it is that the protocol version has to be identical on all your machines or it just refuses to connect (it has no concept of forwards/backwards compat in the wire protocol), and debian/ubuntu package different versions, so you end up having to build it yourself locally everywhere.

I can't imagine editing any document longer than a sentence or two on mobile, regardless of the editor.

Emacs runs on Windows as well as Linux (& on macOS, too). It works fine on the terminal in Android, but you'll want a keyboard, too.

In principle you could add special Android bindings for emacs which would make using it without a keyboard somewhat useful.

A mobile interface for Emacs will be killer. I heard about Orgazly and tried using it but it's a very slow interface. A mobile first design even with limited features will go a long way.

Mobileorg was that app for a while but it's development stopped and it's no longer usable.

Agreed. Don't forget about tablets too; I'd happily pay for someone to make Emacs usable with touch gestures and optimized for touch use (e.g. with a clickable, context-aware button row).

I'm waiting for Emacs to run natively on ChromeOS (or Android) so I can get a Chromebook. (I'm not willing to install Cruton or any of the native Linux hacks on a chromebook).

For Android, Emacs 26.1 is available in Termux. I can confirm it works on my phone. No rooting required.

Thanks for this. Trying now. I always assumed this was some form of SSH/Mosh client.