IMO, the head start that 360 had against PS3 also established a user-base in US where gamers couldn't consider switching onto a highly priced PS3. Also it's attributed to Microsoft's paid service for timed exclusives and a better online multi-player particularly for COD titles where gamers decided to stick on. This will shift on to the Xbox 720 a little bit, but not significantly which will be the game changer. The RROD issue undeniably took away some lead from 360 around 2007-2008. This time we'll have head-to-head competition. PS4 launching earlier can bring significant changes to how the competition fares this time around.
Moreover it's still akin to the number of quality exclusives being churned out. Sony's 1st party studios have been good at this. It's amazing how a console like PS3 even at this stage of console cycle is continuing to get pumped with quality exclusives like TLOU, Beyond Two Souls and GT6. GOW Ascension in a week!
