"I think it's kind of weird...that we've sort of said, 'We've got 20, 30 years of people learning how to do this--sitting on their couch and having a good time, and knowing where the buttons are--and we're saying 'You've got to stand up and wave around and gesture,'" the Deus Ex veteran warned during a GDC 2010 luncheon attended by Gamasutra.

It's not that he's against motion-based controls--"I'm working on a Wii title and I'm loving it," Spector said of Juncture Point's upcoming Epic Mickey--but rather that he's cautious of what will happen if more traditional games and control schemes are abandoned.

"We're in the process of throwing away people--kids, adults--who know this stuff," said Spector. "I don't know if we want to throw away our entire history because we want to use gestural controls...I hope we keep our perspective a little more rational."