Guys I totally get that you want to discuss about technical aspects of BF4 in relation to the new consoles. But stay mature in your discussion, Answer HQ is not a place for blaming people or any other kind of offensive behavior.
Btw.: The first model of the PS3 console was backwards compatible but this model was really fast replaced by Sony. The Xbox 360 is compatible even if not every game is officially supported. As far as announced yet, you can be pretty sure that the new consoles will be not backwards compatible, mainly because of a completely different hardware architecture (that would mean that both company's need to create and provide patches for all the last generation games). Let's say it is even more complicated with this generation and the structure of gameclients as one generation before.
Cheers
Basti