Select one command's output
I've come across a couple of times on various forums the feature request of easily selecting and copy-pasting the output of one particular utility run previously.
With shell integration in its current form, and a bit of new cooperation between VTE and gnome-terminal, we could easily have a context menu entry "Select Output" to select the entire output of a utility at the click's location.
I guess the same could also work with the command line, if that's what the user clicked on, presenting a menu entry "Select Command".
(Probably doesn't make too much sense to do the same if the user clicks on a prompt. In that case we just wouldn't have that menu entry.)