?? ??? ?? ?? ??? ???? ?? ???????? ??? ?? ?????? ???? ??? ????? ????????? ??? ?? ?????? ? ?? ??????? ????? ???? ????? ??????? ??????.With past hardware architecture getting carried ahead to the next consoles, Microsoft and Sony have emerged as powerful advocates of backward compatibility.?????? ???? ??? ??????? ?????? ??????? ?? ???? ???? ????? ????