Tried it on my Droid4 and indeed emacs works. I do like the keyboard on the N900 more though.

N900 is for me like an old familiar car.
Not that fast, spare parts are not available anymore, less reliable, roof leaks, less comfortable and wouldn't use it for long trips. Still excellent for short trips, gets me from a to b and I know how it works. Cheapest way to drive.

Still have 4 N900's in pristine condition.
Will keep on using it until Leste is matured and available on a modern preferably open phone/handheld with keyboard.