I remember when this was being painted. The expression in their faces are so sad especially in Hera's eyes. It really looks like Zeus is holding her in such a longing way, but not really longing for Hera, which would explain why Metis is in the background, showing that Metis is still Zeus's real love and that she never left him (even though she still lives on inside of Zeus) and kinda... haunts him in a way to this day.
But still the details in this picture are phenomenal, as always. The cloth, the shading, and the hair (OH GOSH, THE HAIR~~~~) are well done and you can even see some of the texture and fabric there is.