Found by junior gruenel.
http://www.theverge.com/2013/8/22/4646696/ps4-mark-cerny-interview-gamescom-2013
Verge: There's a lot of indie developer love at Sony, but you don't seem to have as much of a focus on exclusive titles as Microsoft. Is that perception accurate?
Cerny: I believe an underappreciated aspect of what's going on is that PlayStation 4 is the world's most powerful games console, and I think that is going to become increasingly apparent as time goes by. Even if titles are multi-platform, if the game experience is more responsive or more visually attractive on a certain platform, it definitely does play into the overall success.
http://www.theverge.com/2013/8/22/4646696/ps4-mark-cerny-interview-gamescom-2013