I would really like to see a fully featured terminal based editor that is built with modern keybindings in mind. I've given Emacs a solid chance but ended up switching to Atom (weird keybindings and configuration that kept breaking made me leave in the end). I like most things about Atom. The package system. How it's configured and navigated. But there's a simplicity (and memory footprint) of the terminal based UI that is missing to really make it the perfect editor (for me).