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