An official Battlefield blog post has clarified details on the console upgrade transfer from current gen to next gen, and has also confirmed the release date for Battlefield 4 on next generation consoles.
Battlefield 4 will be available for PlayStation 4 starting November 12 in North America, and November 29 in Europe. It will be available on Xbox One starting November 19 in North America, and November 22 in Europe.It also has been confirmed that your Battlefield 4 Premium membership will carry over to the next console, in addition to all of your multiplayer statistics.
http://battlefieldo.com/threads/battlefield-4-console-upgrade-details.10878/