For me it is such a great capture of the mood of the room with the boredom on the right, restlessness of the defenders and defendants at the two tables, her Honor presiding and most notably Conrad less than enthused off to the far left.
It is really cool how an illustrator, can take away the colours, the textures, lighting and other aesthetics to say more about the feel and tone of the room.
I went to an small and person Terry McBride talk last night and he noted that what made Sarah Mclaughlin such a powerful, beloved and successful artist is that she uses silence brilliantly. you can often say more with less. Pretty sure the link to making an effective ad is more or less obvious.