Frank Gibeau was speaking at gamescom when he revealed his thoughts about the future of gaming and briefly referred to the new Sony and Microsoft consoles.
© Sony
"I've seen both of them," he said. "Ten years ago, we used to measure our market in terms of 200 million people.
"Now we are at a billion people playing games, and we have a straightline view on two billion."
Rumours have been circulating regarding the successors to the PlayStation 3 and Xbox 360.
Hardware details have apparently been leaked recently about the PlayStation 4, with its codename said to be 'Orbis'.
A leaked document for the new Xbox has also supposedly been leaked, while the console is reported to be at the manufacturing stage in Texas.
Photo gallery - Xbox's ten-year history:
Copyright: Microsoft Games
