You provided really good cases for the rest, but for this I can't quite picture a need (other than maybe scrolling, which is arguably faster using vim movements already). Do you have any ideas?
Kind of like how keys are reused in Vim yet have similar meanings across each mode. You don't have to remember so many unique keybindings.
Some editors let you switch between panes with keybindings, but once you have more than a few or some in weird shapes, you end up needing tmux's `C-b q` pane selector. Seems like gaze could replace most of that.
Minor use cases, perhaps, but something that operates intuitively has the potential to be pretty awesome.