I think something that most "gap" threads miss is that the larger the install bases are, the less difference said gap is making.
Back when 360 had say, 10 million install base and PS3 had 5 million, that's double the install base, which might be significant for a developer, for example, to decide on making a game exclusive for one system.
Now, with one console at around 55 million, and other at 50 million, the difference is a mere 10%. Such difference tends to get even lower as long as they continue selling, so I think even if PS3 doesn't surpass the 360 anymore, it just doesn't matter. MS managed to get its great marketshare, and Sony managed to prevent the PS3 from failing.









