Does any game for any system have replayability? I mean once you beat a game it is unlikely that your going to go back to it. The only reason to replay a game is to trophy hunt, or if you don't have the funds to get a new game. That goes for all systems.
Microsoft focuses on multiplayer-friendly games which is why they sell more and have more replayability (aka Halo and Gears), most of Sony's exclusives are single-player exclusively or tack on a non-impressive multiplayer component. And then there's youd CODs, Battlefields, Maddens, NBAs, etc.
I believe that's what he meant.