This could be considered good news if it did not imply that public transportation in Copenhagen is deficient. Paris is now down to only 40% of the residents even having drivers licences, which doesn't at all mean that they are all on bikes but that they find the local transportation system sufficiently adequate for their needs.
Yes, obviously cycling, while important for many reasons, can't be the entire solution in large cities. Some people have long commutes - cycling, especially cycle hire schemes - can be ideal to get door to door transport, in tandem with public transport, including commuter trains. I have friends who live in Rotterdam - one works in Amsterdam, the other in the Hague. They take commuter trains, and rely to some extent on bicycles at both ends. Amsterdam is a small, compact city as compared to Paris or London, but it is part of the Randstad conurbation, where many people live in one of the cities and towns and work - or study - in another.
Cycling can also relieve some of the rush-hour congestion of the métro system. Yes, Paris has an enviable system, but some of the lines are pretty horrid in the middle of rush hours.