Age 5 in kindergarden. Libraries IMO will be thing of the pass just like the pay phones with all the electronic gadgets and information online in the future. Or there will be server and desk tops instead of paper books.
Think how easy it would be to just write book in the computer save it , back it up, and sell it. All without even having to go to the bank to cash the checks or have publisher involved? Paper back production/storage will be gone. Look at all the trees it will save
Next to go will be paper money and coins. That way the can trace ever penny or transaction for tax purposes.