One of the biggest strengths is just this. I use VIM key bindings everywhere: Chrome, FF, Terminal, even Emacs. Back in the day where I also did much work on Windows, I also had them in Visual Studio and MSSQL Manager.
The difference is that I move the hands off the middle row, and use the cursor keys and the home-end-pageup-pagewn keys, sometimes combined with the ctrl-alt-shift modifiers.
Actually the vimium plugin for Chrome is great in that respect. I guess I can do 80% of my work with vim keybindings now.