"Also vim has been setup by default in a humane way (arrow keys work, backspace..), so that starting on this long and glorious journey won't begin with a punch in the face."
Awesome.
Awesome.
Yes, the awesomeness would be through the roof, having Vim AND Emacs on a tablet (but only with a full size keyboard with a Caps-Lock that could be mapped to Ctrl :)
The Android keyboard event model has horrible handling of modifier keys. Basically it's a total crap-shoot whether a chord is passed through to the application or silently eaten. So you might e.g. get events for something very simple like Ctrl-A, but not Ctrl-Space or. Meta-Left.
And even rooting your device and editing the key mapping files to specify outputs for these chords doesn't necessarily make them available to the app. I haven't dug too much into why. If anyone knows, I'd love to know.