COMMENT There was a time when two princes would have duked it out (cheap pun alert) on some muddy battlefield surrounded by their barons or over a game of dice in some smoke-fugged back room in a London gambling den or had a wobbly go at each other with fireplace pokers after a third postprandial brandy. Like Wall Street, war and pretty much every industry on earth, the monarchy is now a business that is largely conducted online. And as antithetical as it might seem, the royal family has a proud tradition of embracing the newest of newfangled technology to...