Bungie has its next IP planned out in some fashion for the next 10 years. That means that there’s probably going to be a hardware switch somewhere in the middle, and Bungie is prepared for that too.
“I don’t know if developers aren’t ‘ready’ to kick off a new generation of hardware, but not knowing exactly when that shift will happen is definitely challenging as you begin mapping out a future title,” said Bungie’s Brian Jarrard. “Our next project after Reach has to be planned, engineered and designed to potentially span multiple hardware generations considering we are working on a decade’s worth of storytelling and game experiences.”
Source: IndustryGamers {link no longer active}