The main function of library had been source of information before invention of media and Internet. But, especially after expansion of Internet, its worth has been comparatively declining. So, libraries have to think about how to survive in this era.
Many kinds of industries are currently collaborating with Internet. Then, libraries also have to make use of the Internet, though it would be one of the enemies for them.
So, it's one of the strategies that they offer free Wi-Fi service in the libraries.
In addition to it, by making libraries bigger and bigger, it's possible to cover what's not written on the Internet.
To sum up, free Internet and bigger libraries will be one of the ways for them to survive.