"I don't see it as a problem at all," Zelnick said today during the Credit Suisse 2013 Annual Technology Conference. "I don't think backwards compatibility affects consumers at all."
Zelnick said gamers who want to continue to play their Xbox 360 or PlayStation 3 games can simply keep their existing consoles and use an input switch. It's "no big deal," he said. His comments match up with what former Xbox executive Don Mattrick said during E3 in June.
At the time, Mattrick claimed that only 5 percent of gamers play past-generation titles on new machines. Thus, it would not make sense to invest time and resources into creating technology to allow gamers to play older games on Xbox One, he said.
"If you're backwards compatible, you're really backwards," he said at the time.
Though the Xbox One and PS4 do not support Xbox 360 or PlayStation 3 physical discs, Microsoft has said its cloud servers are capable of streaming full games, while Sony has confirmed users can stream PS3 titles on PS4 through Gaikai beginning in 2014.