My colleague Stephen Bainbridge suggests "an interesting parlor game for lawyers":

How would the world be different if such and such case had been decided the other way? Create your own counterfactual in the comment section.

Keep in mind that you should consider the reaction of Congress and the public. For instance, if a hypothetical statutory decision -- contrary to the one that was actually rendered -- would have been promptly overturned by Congress, with little lasting political effect, then the world would not be materially different in that hypothetical.