Now I know many here dislike it but here me out with this.
If you dislike the Monarchy then look at the wedding like this, it shows to us the political and economical stability of the country. It shows to us that 2 people can bring millions of people around the world together. The reason I said the economic side was because we as a nation (well the vast majority) was able to take a day out of the working week to celebrate today.
Also some people have used this occassion to help raise money for charity so really many will be helped by this occassion.
It also represents the past, present and the future because the wedding has showed us that someone who was born a commoner has now married into the Royalty so really the future King and Queen will be the Monarch's of the people. Many Royal weddings in the past have been for political or economic reasons. So really this wedding has been for love between 2 people more than anything which is the true real reason of having a wedding.