Ibaka's fake 4 comment was taken way out of context when reported. He didnt mean he wants to be a center, but that he needs to play more like a stretch 4.
“After this season, I feel like I have to be like a stretch 4, no more fake 4. You know, like no more — because that’s the way the team wants me to be. That’s the way of the team, specifically when you’ve got one of the true great offensive players like Russell and Kevin that can put the ball so easy inside the basket, and you’ve got bigs like Steven and Enes who can really do many things, so I had to be a stretch 4 for them. I have to."
http://dailythunder.com/2016/06/exit-interviews-whats-gonna-happen/