There is, of course, a danger that the religiosity of the ceremony today was all show. And that those present do not heed the words of the bishop of London’s sermon. The archbishop of York apparently has not helped matters:

He said he had conducted wedding services for “many cohabiting couples” during his time as a vicar in south London.
“We are living at a time where some people, as my daughter used to say, they want to test whether the milk is good before they buy the cow,” he said. “For some people that’s where their journeys are.
“But what is important, actually, is not to simply look at the past because they are going to be standing in the Abbey taking these wonderful vows: ‘for better for worse; for richer for poorer; in sickness and in health; till death us do part.’”

I live in the real world too, but I know what we should be aspiring to here, encouraging, and teaching. There are some pretty good reasons too, perhaps the archbishop needs a practical, nevermind theological primer?