Battlefield 4 which will be releasing on October 29th, will have an open beta on Xbox 360, PlayStation 3, and PC on October 1st. While next-gen consoles such as the Xbox One and PlayStation 4 will be releasing later, EA is releasing Battlefield 4 onto current generation consoles and then will transition over to next-gen. This allows for everyone to get a feel for the maps, items, weapons, and all that good stuff to prepare.
Better yet, if you choose to do so, you can upgrade your current-gen copy to a next-gen copy for the price of $9.99 using a voucher code that comes with your physical copy.
Source: EA Blog