> Severity: wishlist
>
> In the completion interface for M-x, please add functionality to show
> the key bindings in parenthesis after the command.  This functionality
> is already there in the highly popular helm and swiper completion
> frameworks, which could be useful for reference.
>
> For example, when typing M-x kmacro TAB, one should see:
>
>    kmacro-insert-counter (C-x C-k TAB)
>    kmacro-set-counter (C-x C-k C-c)
>    [...]
>
> Ideally, the keybinding should also use a different color from the command.
>
> This was discussed on emacs-devel, and Stefan Monnier suggested that
> it shouldn't be too hard to do:
> https://lists.gnu.org/archive/html/emacs-devel/2020-01/msg00115.html

Indeed, not hard at all: