http://www.polygon.com/2013/5/22/43...compatibility-backwards-thinking-don-mattrick
http://www.gamespot.com/articles/xb...-compatible-with-xbox-360-games/1100-6408668/
"If you're backwards compatible, you're really backwards," said Mattrick, president of Microsoft's Xbox division.
http://www.gamespot.com/articles/xb...-compatible-with-xbox-360-games/1100-6408668/
quite funny honestly :-DSpeaking to The Verge, Microsoft Xbox Live vice president Marc Whitten said that the architecture between the two machines is too different to allow for backwards compatibility. "The system is based on a different core architecture, so back-compat doesn't really work from that perspective," he said.