If I could design the library of the future, I would make a computer that would listen to your voice. You would tell the computer the name of the book and/or the author of the book. Then, the computer would tell you where that book is located.
If someone wanted to sit down in a comfortable chair, they would have to whisper (because it’s a library), “Comfy chair.” Then, you would have a comfy chair to sit in. That way, no one would have to fight for chairs.
I would also make a moving device that would take you were you want to go in the library. For example, if you tell the computer which book you want, you could take the moving device to the location of the book so you don’t have to walk a far distance.