I think when you get to that level that Sony is at right now there really is no catching up. The PlayStation 2 is the best selling console of all time bar none, and the only thing that looks like that'll pass it is the PlayStation 4.
IT could be possible ,it could not be possible, we never know. The only way to find out is waiting until they release their new consoles to see which one is going to beat the other.
@Casiox for now we can have an rough idea of what it's going to be like by looking at the sales of the XBox One vs the PlayStation 4.5.